nippin Share definition Flag When a girl is horny, or cold, her nipples will get hard. When you can see hard nipples under a shirt, this is called nippin. "Dayum! That foin bitch fuckin nippin dawg!" nippin by djBOGUE May 7, 2003 0 0 Get merch Get the nippin mug. Buy Now — $32.95 See more merch