The phrase "Mickey Mouse" used as an adjective suggests incompetence and ineptness. If you watch the classic early Disney cartoons, with their wit, their skill and their invention you realise how unfair this is. Walt Disney Animation – leaving aside the horror that is Mickey Mouse Clubhouse – is always worth watching.
That is why it is so galling to watch Donald Duck promote population control in this propaganda film from 1968:
The naivety is refreshing. IThey are not worried about there being too many people, they are worried about too many brown people. Donald would not appear again in a Disney cartoon until Mickey's Christmas Carol from 1983.