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the back side of your knee, or back side of your knee cap. due to its difficult-to-reach location it tends to sunburn often and remain hairy after the rest of the leg has been shaved.
ann: oh my gosh jan, your back caps are so red!
jan: i know! when i put sunscreen on i missed that part and now my back caps hurt like a bitch whenever i sit down.
by whoopie August 10, 2007
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(1940's) a sharp reply - associated with "The Dozens".
- ...the neighbor's sleeping with your lil' mom....hehehe
- Quit the dozens, you ass! You probably can't take the backcap
by William Warney April 26, 2011
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to capture, claim, move, or do some sort of main objective in a multiplayer game behind the enemy's back
Dude, did you just backcap? That's sick
by Hurummph November 11, 2017
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