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1.
Someone who goes hard at clubs and is willing to go after any milf he sees. A-Macs are very difficult to find. It is uncommon to find one. They like to sing and go hard at drinking.
The other day i was at the club and the A-Mac was living his life like there was no tomorrow.
by Sergio Villa October 23, 2012
 
2.
See: pussy, or vagina...
Boy that AMAC sure is a huge pussy
by Hari Balasingham April 22, 2006