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1.
The severe disease when you have uncontrollably rocket sized nipple rocks. They are very noticeable and fairly unattractive.
Weston: Holy crap Geoff, do you have metal tits?

Geoff: Yeah, I do, I guess Im a little horny
by BlazingBlasian March 01, 2011
 
2.
Pierced Nipples
Geraldine Rivera is Metaltits
by metaltits May 07, 2012