Definitions by Pseudonym202020

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