primate pile up Share definition Flag the act of large primates pileing up on each other and butt fucking performing one big orgy Dude, did you see that primate pile up on animal planet last night? it was crazy! primate pile up by donkey kong6999999999 April 17, 2011 0 0 Get merch Get the primate pile up mug. Buy Now — $32.95 See more merch