( often caps. ) Informal.
1. trite and commercially slick in character; corny: mickey mouse music.
2. useless, insignificant, or worthless: mickey mouse activities just to fill up one's time.
3. trivial or petty: mickey mouse regulations.
[ 1930-35; after the animated cartoon character created by Walt Disney, orig. with reference to the banal dance-band music played as background to the cartoons ]