hilarapee Share definition Flag can be a noun or verb. the act of peeing because you laughed too hard, to pee from hilarity. hahaha you're so funny. you have no idea. i just hilarapeed. hilarapee by snl1992 June 24, 2010 0 0 Get merch Get the hilarapee mug. Buy Now — $32.95 See more merch