mickey mouse

adjective (often initial capital letters) 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.

adjective (sometimes not capitals) slang

1. ineffective; trivial; insignificanthe settled for a Mickey Mouse job instead of something challenging
2. mainly US and Canadian (of music, esp that of dance bands) mechanical or spiritless

cartoon mouse character created 1928 by U.S. animator Walt Disney (1901-1966). As an adjective meaning “small and worthless” it dates from 1936, originally used especially of mediocre dance-band music, a put-down based on the type of tunes played as background in cartoon films. A cartoon character created by Walt Disney. Mickey’s image is so widespread that he has achieved the status of myth.