mwi 

mad wae it, to be totally steamin (pissed) or buzzin on sumthin.

hawhawhaw i wis mwi last night likes

mwi by ABUAMBZA January 19, 2008

MWI 

'Mad Wae It'

to be incredibly drunk
used in West Scotland, mainly Glasgow.

'aww man a was proper MWI last night eh?'

MWI by weeegiemaaan May 13, 2010

Mwi 

When You Are Mwi You Are Drunk Or Steamin

I Was Mwi Last Night

Mwi by JakeyBumTumm August 31, 2007

mwi 

Means - "Mad wae it" / "Mad with it"
To be drunk or full of drungs, most likely to be drunk.

John: "Coming to get mwi this weekend?"
Rydo: "Aye moan, get heavy rat arsed"

Lauren: "You're mwi !"
Brogan: "I know, i'm steamin !"

mwi by Pseudonym202020 October 6, 2011

mwi 

met while incarcerated

girl 1: did you date each other before he went to prison?
girl 2: no, we're mwi.

mwi by snugglefrump October 17, 2011

MWI 

Man With Ideas. Particularly in the academic context, a brilliant professor or researcher who continuously generates new ideas instead of doing the same research over and over again.

I would work with Prof. Jenkins, he's an MWI!

MWI by droswenw September 28, 2011

MWI 

Myspacing While Intoxicated. The act of going on myspace while under the influence of pot, alcohol, or any other drug.

Nikol: Wtf were you talking about?
Me: Sorry, i was MWI, lol.

MWI by benny_boi March 11, 2009