I found this on Facebook and I really should have looked harder for a source. Apologies 
By Garland Davis
Source
Walking fast.
You might be doing a great job of blending into your civilian surroundings, but your walk is always going to give you away. Sailors walk with a purpose as if their trip to the grocery store is a CNO press briefing.
Hair.
Broke your habit of getting a high and tight? Good for you. But that leaves you two options: the fade and the classic “Officer or Pilot hair.” Yes, we see you pushing the edges of the “three inches on the top” rule as prescribed in Naval Regulation 2201.1.a.
Eating fast.
Habits are hard to kick. And rarely in the Navy did you ever have ample time to appreciate your food even if you could.
The Power Stance.
Chief Petty Officers and Officers are easy to spot: Just look for the person attempting to own the room with the “crossed arms and not leaning against anything” stance.
Jargon.
Just try not to say “Roger that,” “Aye, Aye,” or “negative” in conversations. Just try. Eventually, your language will out you.
Walking.
There is no way that a group of Sailors can take a casual stroll down a sidewalk without eventually falling into step. Even if you try not to, you will.
Sunglasses.
Congratulations, you’re not wearing Oakleys or G.I. frames. Well done. But you’re still wearing sunglasses all the time, even when it is cloudy out.
Absurd politeness.
You can easily pick out Sailors by their over usage of “sir” and “ma’am.” It is a credit to the Navy’s discipline that a cashier at Piggly-Wiggly receives the same clipped tones and politeness That a Three Star Admiral would.
Scanning Crowds.
Go to a department store, a mall or a party, and you’re bound to see that one person who is constantly scanning. Standing usually somewhere where they can see the whole room. And may God help the person acting suspicious because the Navy promotes being confrontational.
Sleeping Anywhere.
Sailors can sleep approximately anywhere, in any weather, on anything. They also come out of it rapidly and coherently.
And finally... You can’t converse worth a shit without using words Mom told you not to say
