Grab ass Day! Share definition Flag This is the Day when you are allowed to grab a persons ass Andy blame that it is grab ass day So you go to a girl you want to grab ass on and then you just do it because it is grab ass day! Grab ass Day! by Thanks me later October 2, 2019 0 0 Get merch Get the Grab ass Day! mug. Buy Now — $32.95 See more merch