{Image Source: Weird Sea Creatures}
I don't know about you but until today I thought FUD meant Fu$%ed Up Discussion.
The more I started thinking about it, the more I realized there might be a lot of other people on Steemit who don't know what FUD and other slang terms mean. Although I've been on Reddit, my historical social media haunts are more along the lines of Medium, Twitter, Instagram and Facebook. As I've mentioned many times, though, I have pretty much tried them all, even ones no one has heard of, like Findery.
I know there will be a lot of slang words I missed in the glossary below, so if you have ones of your own to add, please leave them in the comments.
Also, some of the words contained below are my own, and so they may not be in wide usage or circulation. If you see any errors in the definitions below, I'd appreciate your corrections. What you see below is a mish-mash of slang terms from various sub-groups including Reddit and cryptocurrency culture, plus many of the terms are unique to Steemit. If you stay on Steemit for any length of time, you're bound to see these words in the comment threads. I'd be really appreciative if the miners and witnesses could add the slang terms they use when doing their work to secure the blockchain.
Bag Holder
Someone who holds digital currency coins but who doesn't cash out, even when the price of the coin is high. It can also mean someone who holds onto the altcoin til the bitter end, when the coin becomes worthless.
Butthurt
An inappropriately strong negative emotional response from a a perceived personal insult.
Circle Jerk
When a group of people get together for a debate but then all end up agreeing with each other. It's like a choir preaching to itself. The origin of this word comes from a group of males who sit in a circle jerking each other off.
Dickbutt
An anthropomorphic phallus with a pair of testicles and a penis protruding from its backside. This concept was first created by K.C. Green in 2006 from the webcomic, Tree. You’ve Been Good to Us as part of the Horribleville series. Steemit user 
Flagged To Death
This describes a Steemit post that has received enough flags by powerful whales to render it a zero rewards post. Rekt can also be used to describe this situation.
FOMO
A pervasive apprehension that others might be having rewarding experiences from which one is absent. This social angst is characterized by "a desire to stay continually connected with what others are doing". FOMO is also defined as a fear of regret, which may lead to a compulsive concern that one might miss an opportunity for social interaction, a novel experience, profitable investment or other satisfying events. In other words, FoMO perpetuates the fear of having made the wrong decision on how to spend time, as "you can imagine how things could be different". Definition by
FUD
Fear. Uncertainty. Doubt. This term is used indiscriminately and basically any logical criticism can be described as "spreading FUD."
Ghost Post
When someone with a negative reputation on Steemit posts, their posts are greyed out and can be described as ghosted.
Kicked Off The 19
When a witness begins losing popular support, he/she gets a lower ranking and can be pushed off the top 19 witness list. In Steemit, only the top 19 witnesses are guaranteed to receive regular compensation for their work in securing the Steem blockchain. Witnesses do similar work as miners in Bitcoin.
Lazy Curating
When whales don't manually curate posts, but rely only on their bots to do it for them.
Makeup Tutorial
The moment in Steemit's history that the sausage party was officially over. Steemit user 
Ninja Mined
When a new coin is pre-mined by its creators, meaning there is no public ICO, and most of the coins go to the founders, it is called ninja mined.
OP
Original poster.
Pump 'N' Dump
"Pump and dump scams involve two groups of people. First there are the players who artificially increase the price of a coin by promoting or endorsing it. They’ve spent several minutes, hours or even days buying up cheap coins, and when they are ready to dump them, they build up the buzz. As buzz around the coin gains momentum, trading volume increase and the coins value goes up. You are both the pump and dumper. Once the coin hits a desired price the players sell all their coins, and people begin to panic sell, dumping their coins on the market and sending the price plummeting." -Cryptocoins News
Rekt
To lose a great deal of money on a cryptocurrency trade. This word is also used in Steemit to describe a flagged post that results in zero rewards. Example of usage provided by 
Sausage Party
This term was used to describe the very early days of Steemit when the percentage of male users was above 90%.
Sharkwhale
An evil whale who drains the reward pool for himself and his friends only. Definition provided by 
Shill
A person engaged in covert advertising. The shill attempts to spread buzz by personally endorsing the product in public forums with the pretense of sincerity, when in fact he or she is being paid for endorsing the product.
Shitcoin
An altcoin that is characterized by an inherently crappy, scammy or other unsavory, unstable quality. Also called scamcoin. OneCoin is a good example of a shitcoin. This word was popularized on Steemit by the video, Do You Want To Trade Some Shitcoins? by 
Shitpost
A post that is written by a friend of a whale which is characterized by its subpar, poor quality but which receives a massive reward payout and usually ends up at the top the trending page. Shitposts are the main reason that people outside of Steemit view Steemit as a rigged casino.
Sockpuppet
An online account used for purposes of deception. It's a reference to the manipulation of a simple hand puppet made from a sock. 
Steempreneur
An entrepreneur who is creating new business ventures in the Steem universe.
Steemroll
When your post plows through all the rest to get to the top of the trending page. Definition by 
Sybil Attack
The attacker subverts the reputation system of an online network by creating a large number of pseudonymous identities and uses them to gain a large fake influence.
TL;DR
Too Long Don't Read.
Whale Bot
A computer program that is designed to automatically upvote certain authors and which can run even when an account is not logged in. [this needs to be verified]
Whale Flagging
This describes the action of powerful Steemit users when they flag a post on Steemit. The flagging by these powerful users causes the monetary rewards to greatly decrease, even down to nothing in many cases. Whale flagging is controversial because whales flag posts not only for plagiarism, scams and abuse but also for disliking the content, tone or message of certain posts or users.
Whale Teat
Signifies the act of a whale putting an author on a whale bot list. If an author is on a whale teat then that author will be automatically upvoted from that particular whale.
If you have additions to this Steemit Slang glossary, please add them in the comments below. I know I'm missing a bunch of them. Thanks.
If you have more questions regarding Steemit, remember there is Steem Help which contains a lot of links to various Steem applications and a knowledgebase. And one of my favorite Steem tools is Steem Stats made by 
.
{If you'd like to learn how to add a link to an image like I did above, click here for Markdown instructions.}
Here's the code I used to create the clickable "follow 