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1.
A gaming slang term for masturbation.
Gamer1: Hey did you see pappy? He was crouching soooooo hard!

Gamer1: Hey why is true afk?
Gamer2: He's probably crouching.
by Gatman94 January 02, 2011
 
2.
To make yoursrlf sound superior and others feel inferior by mentioning your acomplishments or another's flaws.

Origin: Using the "crouch" action to perform the act of corpse humping.

Co-creator: Tyler C.
"i see you got a 98% on that last test, that's pretty good...but not as good as my 100%!"

"is he crouching AGAIN? He's such a show off..."
by Chase Caspian October 10, 2006