A man who nags.

In particular, any boyfriend who nags his girlfriend or any husband who nags his wife.
I need to dump my new boyfriend. He is such a mag! I'm tired of hearing that I don't respond to his texts fast enough.
I am so tired of my husband's incessant magging. He is the King of Mags! He can wash his own clothes and cook his own dinner.

The guy I slept with last weekend is such a maghole. He keeps texting me and won't get lost.
by charlestonchick January 8, 2015
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In England especially, a mag is an exceptionally short penis. The word derives from the word maggot which is the name of a wormlike insect larvae - the connection being that maggots are rather small. The word is used as an insult towards someone who is known or suspected to have a small penis. If the former is the case, then the one with the mag can duly call the insulter a pervert. Usually the accusation is false, and is believed by those who are insecure about the length of their own penis and who feel better about themselves by mocking others.
Haha look at that short kid. Because he's short he must have a mag. Let's tell him our conclusion: MAG!
by Lewberto May 26, 2009
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Got the golden ticket, I'ma pop a mag on her.
-Lil B of The Pack, Ass On Deck
by LadyAK March 30, 2009
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Short for magnificent.
As in that hottie is so mag man.
"Dahling! That purple mag is just mag!"
"Check out that mag hottie, duuude"
"Man that was the shizznit, the mag way you knocked off that likker sto"
by shakti September 15, 2003
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A fat man on creotine. sweats a puddle. has a sweat tattoo of a rose (faggot). likes his chicks soft and pudgy. best of all has a hot mom and sister (sarah)
u are such a mag.
by mystery78967865767 October 7, 2008
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