Crush Box Share definition Flag A vulgar, but entertaining, idiom used for describing the act of vaginal copulation. Derived from the slightly more vulgar expression "crush piss box" Son, if the third base coach waving you in, go crush box. Crush Box by DTP4L4L March 23, 2010 0 0 Get merch Get the Crush Box mug. Buy Now — $32.95 See more merch