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1.
1.) See Spanish word "Mamon".

2.) Idiot, asshole, moron, fucker.

3.) To fuck around. Act stupid.
That guy is such a mamer.

Charlie is maming again.
by SUPERDAVE March 13, 2003
 
2.
A videogamer who uses the emulator known as MAME (Multipe Arcade Machine Emulator)
I agree with my fellow MAMEr's that street fighter II will always be the greatest fighing game.
by Ad24 March 22, 2006