Harelip Share definition Flag v. To hit someone in the face so hard it splits the upper lip. Normally it's used figuratively. "It's going to harelip Uncle Cracker when he finds out he's got African blood. The joke's on that racist POS!" Harelip by Texas Nell March 3, 2017 0 0 Get merch Get the Harelip mug. Buy Now — $32.95 See more merch