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1.
The possible cause of male bitching.
Yo bro, you must have a sandy mangina -- give it a rinse!

Or, the term is implied when saying "Bro, give it a rinse!"
by Sandy Mangina November 06, 2006
 
2.
A man who acts like a woman (see Sandy Vagina).
My friend, Sandy Mangina, is a man, but acts like a damn woman.
by Bob August 01, 2003