Well I once again learned something interesting today after I stumbled upon this video: Deaf People Teach Us Bad Words | Deaf People Tell | Cut, after browsing some random videos on Youtube.
I learned how to insult in sign language and might as well share it to everyone of you in here. XD
Disclaimer: All images shown below are not mine and are just screenshots taken from the above link
Anyway if you want to watch the full version, go watch it here:
All credits goes to the video above.