crap on thighs Share definition Flag used instead of 'shit' or 'fuck'...think about it...crap on your thighs must feel terrible...you'd get chaffed and everything (i just missed a pool shot) "CRAP ON THIGHS!" Then keep on drinking. crap on thighs by carl berg March 30, 2003 0 0 Get merch Get the crap on thighs mug. Buy Now — $32.95 See more merch