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1.
to pull on one's nipples and twist them around causing slight to extreme pain.
One of these days I'm going to give Tara a titty twister.
by youknowit April 11, 2003
 
2.
The grasping and twisting action of the thumb and index fingers on another persons nipple, to inflict pain.
Dean gave Jordan a titty twist yesterday.
by T-Bag 1994 February 19, 2014