Used in South Africa when you tweak a mates nipple normally done on guys. Girls get very upset if you do it to them. Normally done in a joking manner between mates when indulging in horseplay.
Stop giving me shit or i'll give you a cripple nipple.
an inverted nipple, as if the protruding part is actually pointed inside
I was disappointed to find that she had had a cripple nipple rather than two erect mike and ikes when i took her bra off.