from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Unimportant; trivial: "It's a Mickey Mouse operation compared to what goes on in Lyons or Paris” ( Jack Higgins).
- adj. Irritatingly petty: the school's Mickey Mouse requirements for graduation.
- adj. Slang Intellectually unchallenging; simple: His Mickey Mouse assignments soon bored the students.
- adj. Slang Melodramatic or sentimental. Used especially of popular music.
After the cartoon character Mickey Mouse, created by Walt Disney.(American Heritage® Dictionary of the English Language, Fourth Edition)