doing the same thing over and over again and expecting a different result
madman: im gonna run into this wall until i can phase through it

random guy: thats madness
by shamalamadingdong January 8, 2008
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1. Crazy

2. Angry

3. Extremely, very, a large quantity
1. Are you mad?

2. WHy are you so mad, you ain't had to hit him.

3. Yo I his car has is pumpin' mad bass
by ac July 15, 2004
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Monday Afternoon Drinks.

The earlier version of or prelude to MND.

MAD allows you to get really pissed if you do MND as well or mediocre drunk if you go home on time.

Doing MAD too often is bad for your social and work life because you will come across as a alcoholic hobo and eventually will become one. MAD is best enjoyed in the Christmas / New Year period.

although MAD can be fun, TAD, WAD, ThAD and FAD are better.
A: I don't feel like working.

B: Me neither.

A: Shall we go for a beer?

B: Already?

A: Sure, let's go MAD.
by Milanifan January 20, 2011
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When a group of thugs/chavs/delinquents etc all meet up in a group and ambush/single someone out to harm or even kill them.
Oi mate, up for a Madness tonight?

Yeah, Sure! what time?
by NonChavLutonian July 9, 2009
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Anne Marie has a Mad On because her boyfriend dumped her (again), she lost her job, and her pet goldfish ran away.
by AlJP May 7, 2007
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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 21, 2004
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An adjective

Instead of sounding like a total noob saying "really," say "mad" in front of any other word to sound like you're from the hood, or a mad SoundCloud rapper.
Hood Rat 1: Damn, I mad miss xxxtentacion...
Hood Rat 2: I'm still not over Lil Peep, bruh.
by im_in_pang July 25, 2018
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