A game, the object of which is to affix a bulldog clip to the nipple of your opponent. Can be played by both men and women, and mixed competitions are not unheard of.
An overly-sensitive nipple. The word derrives from a woman who becomes aroused with the playing of her nipples, as if she has a clitoris on her nipple. Clitoris + Nipple = Clipple.
I was sucking on her tits when she started to moan, she must have had a clipple on her boob.