nippin' 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' out when a person is wearing an unsupportive bra or no bra at all and they get hard nipples. Their nipples show through their shirts also. ; > When it gets cold, everyone is nippin out! ;