slap your neck Share definition Flag The act of a hard neck slap; if someone looks at a persons hand symbol below the waist or if someone does something idiotic. Person 1: Hey whats 6 x 3? Person 2: 54. Person 1: It's 18 idiot. Slap your neck! slap your neck by TreyFFA December 20, 2017 0 0 Get merch Get the slap your neck mug. Buy Now — $32.95 See more merch
