When you're talking mad shit, a thing you say whilst gesturing a cap being over your head (in the form of a triangle) to protect oneself from receiving any bad Karma. A way to ward it off.
Saily: Her forehead is so big! OMG Erika, fucking Karma Cap! *Gestures triangle cap over head*
by Cristi<3 May 25, 2008
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When one forms a triangle with their hands and place it above their heads to prevent bad luck.

Usually a sports affiliated gesture that is done more out of routine than superstition.
Jake always place a karma cap above his head when talking about the championship game because he doesn't want give his team bad luck.
by Sflow69 January 24, 2016
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