The most famous Disney cartoon character, an anthropomorphic mouse with a falsetto voice and a cheerful disposition.

(idiomatic) Of inferior quality.

(intransitive, Britain, slang, idiomatic) To ridicule or mock.

(slang) An alcoholic drink doctored with a drug intended to quickly render the drinker unconscious.

(US, slang) McDonald's (the chain of fast food restaurants).

(slang) McDonald's, a chain of fast-food restaurants.

Alternative spelling of Mickey Finn

(Canada, informal) A very large bottle of hard liquor, holding 3,000 ml (106 imperial oz. or 101 US oz.), or, formerly, one holding 133.3 oz.

(Cockney rhyming slang) piss

Third-person singular simple present indicative form of take the mickey