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2.
Facial Hair Style: Where a man, or in some cases a hairy woman, grows a poostache accompanied by a bunching of chinhair.
Wow Mick, that sure is a filthy Gentleman Caller
by Jesse O. Roy February 19, 2008
 
1.
a man who is the lover of a girl or young woman
I heard about you and your gentleman caller.
by Panic! At the Disco February 27, 2006