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1 definition by dan gemmtinte

 
1.
A bumper humper is a man on man action when he would rather place his penis in other mens asses rather then have sex with a women. This could also be used as a phrase to simply call a man gay.
See that man over there wearing a pink shirt and kissing that other man buddy? He must be a bumper humper.
by dan gemmtinte February 28, 2006
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