A Madmac is someone who is generally "Mad" at the world,

doesn't pay much attention to his/her surroundings also

known to be a cock sucking asshole, bird brain, bitch and a mother f*cker... Know-It-All, usually masturbates too much, GAY and a poor sport... if you ever run into a Madmac Run FAR FAR FAr away....... or pop a few rounds in the head.
Yesterday Chris was being such a Madmac I almost killed him!!

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Dude, dont be such a Madmac!

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Those kids over there are being such a Madmac..
by Boinwa March 27, 2010
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