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1.
A mcdonalds muck, at wee hours of the morning, that gets one intoxicated off fast food.
"Yo I Just Mucked Five Junior Chickens, Im so mcdrunk"

"Im way to mcdrunk to drive"

"Mcdrunk-aments"
by Sallly Perc December 25, 2009
 
2.
Consistently going to McDonalds while intoxicated.
Are we going to get McDrunk tonight?
by Goose1234 December 10, 2011
 
3.
Getting drunk on cheap beer thats served at fast food restaurants.
"Wanna go to Carls and get McDrunk?"

"I would have gone to the bar but I was already McDrunk"
by Brentoholic April 14, 2007