Top definition
The male equivalent of the word "mistress".

In old English, men were commonly referred to by women as their masters. Mastress combines this title and the derogative one given to women to form its male version.
Ryan and I are going to tell Anthony about Tina's mastress because she is a cheating whore.
by Flo February 02, 2005
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2
a mistress who's a master of the matress
Yo Tiger, your mistress is a mastress! "I know, now take my name off this blasted website and do it quickly."
by Gumby007 December 12, 2009
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