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Guys (or girls) who prefer sucking on tit nipples to achieve or deliver sexual pleasure.
He spent most of the time on his date proving he was a Nipple-Nibbler.

He's a confirmed Nipple-Nibbler for sure!
by Alisa the Teeny Bopper April 03, 2010
mmm good sexual act. very enjoyable.
he was being a nipple nibbler all night and i cam from that alone!
by sextraodinare February 25, 2004
to nibble on the nipples of male/female
damn girl i dont like when you fucking do that shit nipple nibbler
by Anonymous March 19, 2003