Totally drunk, absolutely wasted. Indigineous to east kilbride, this phrase comes from a ned (non educated deliquent). In english this term would be "mad with it," but this does have the same effect as the scottish slang version. If you go on a night out in scotland, you will be mad wi' it
You threw up! You are mad wi' it!
by Banjo McGuigan June 02, 2011