Most predominantly used in the greater New York area, "mad" is an appropriate replacement for Northern California's "hella" and Boston's "wicked." In the common vernacular, it translates into "a lot" or "extremely." Can be used almost interchangeably with any of the above listed words.

For the most part, it means angry.
It's mad hot today.
She has mad problems.
by SVex January 17, 2005
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(adj.) an adjective used to enhance a noun.
1- dude, you got skills.
2- dude, you got mad skills.
by will holland January 17, 2004
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1. crazy, insane, demented, nuts, deranged, out of one's mind, bonkers, lost one's marbles.

2. angry (usually limited to the United States)

3. extremely, very
-"I get up before dawn, go to bed at midnight, work until I'm half-mad, and what do I get for it?!"

-"Ophelia's gone mad and she's run off! We have to catch her!"

-"Wow, your mom's really mad!"

-"This book is mad boring!"
by Lorelili April 05, 2008
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New York and New Jersey's way of saying very, it is similar to hella, wicked.
I had mad amounts of homework in school.
I hate that punk, he's mad gay.
Dude, that chick is mad hot.

etc.
by Jersey kid November 29, 2007
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Title of a satirical magazine and subsequent televeision show that pokes fun at the media and current events.
My mom better not throw away my old issues of MAD magazine.
by beto chapa October 07, 2005
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"So how'd you like the concert?"
"Oh it was mad good."
"Yeah I know. Usher is mad hot!"
by amaran January 20, 2004
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