Top Definition
Medically referred to as polymastia it is the presence of supernumerary (extra) breasts on the human body. The extra breast tissue can appear as everything from a third nipple (the most common condition, referred to as polythelia) to a fully-formed — and fully-functional breast. Lily Allen reveals her third nipple on a u tube interview for all to see.
Hey I had no idea you had an extra nipple, and that pearcing is a real party stopper total triceratits.
by ferret February 11, 2009

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