To be mickey moused is to be completely and utterly beyond the realms of drunkedness. 'Plastered' and 'wasted' have nothing on embodying this Walt Disney Character. Steam Boat Willie? Roger Rabbit? Not a chance. You are so far gone that a whole advertising industry could make money from you all over again. Walt Disney made you like this. You basically made the Disney Channel. You are literally 'taking the mickey' out of life. You're Mickey Moused.
Jem was totally mickey moused last night.
Were you drunk? Steve....I was off my mickey.
I can't believe how far gone he was...he was totally moused.
He was so moused that its taking the mickey.