A game in which somebody unexpectantly shows their nipples to someone else, while screaming "NIPPLE TAG!". The person who was tagged must repeat the steps and continue the game, regardless if they are male or female.
The game is usually started by a male in order to see other girls' breasts.
"Man, Jason started a massive game of nipple tag yesterday"
"Yeah, I heard Judy was tagged! Did you see her boobs?"
by asdg;p'ngb December 1, 2007
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