Whack-oplasty Share definition Flag A type of surgery that makes a Whack person.......Unwhack. Man that guy is whack! - person 1 He needs a Whack-oplasty! - person 2 Whack-oplasty by Kyle Cleary March 16, 2005 0 0 Get merch Get the Whack-oplasty mug. Buy Now — $32.95 See more merch