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1.
the art of being oot ones nut. (drunk)
e.g. aw man, oot ma tree last night, pure mad wae it!
e.g. poppin' pills at the art school last night, pure mad wae it!
e.g. nine litre a' pulse... mad wae it!
by flatsteve November 14, 2007
 
2.
Scottish slang for being intoxicated with alcohol, drunk in essence.

Often abbreviated to MWi
John: I can't wait to get mad wae it at the weekend.

Jim: i'm gonna get mad wae it on bucky
by Fiercedeity94 October 08, 2009