ballsitch Share definition Flag When a person touches another person's underside of the chin and shouts out BALLSITCH!, usually used as a joke A bunch of guys came to me and ballsitched me so much, now the underside of my chin is all red. ballsitch by pacmanlikespie April 10, 2013 0 0 Get merch Get the ballsitch mug. Buy Now — $32.95 See more merch