It can be a diminutive (hypocorism) of Minerva, Winifred, Wilhelmina, Hermione, Mary, Miriam, Maria, Marie, Naomi, Miranda, Clementine or Amelia.
Decided to look up what Minnie was diminutive for. Some of these make more sense than others, but Winifred? Winnie I'd understand, but there's no M in the entire name. Not that it really matters, I guess. Just a name.
If I ever go to Disneyland I'm just going to tell people I'm going to Orlando to visit my friends Michael and Minerva Mouse.
That's medieval rhyming slang for ya, which also gave us Dick from Richard via Rick. This is also the root of "penis" as a definition for "dick", with the use of "dick" as a metonym for "man" and subsequently "man" as an implied metonym for "penis", via the placeholder phrase "Tom, Dick, and Harry" meaning "unspecified people".
I wrote this comment in the spirit of linguistic descriptivism (discussing past use of language) rather than prescriptivisism (commanding the reader to use language in a certain way going forward), in order to not carry water for gender essentialism, transphobia, or sexism, due to the direct association of penises with manhood present in the etymologies that I mentioned.
Slang: Turkish
Meaning: laugh
Phrase: Turkish bathI swear these exist just to fuck with people. "Are you 'avin a Turkish?"
Damnit. Now I genuinely want to see an animated series about a cartoon character anti-hero named "Michael Mouse". Something like Gordon Geeko or Jack Donoughy, but in the style of Bojack Horseman.
Him and that ruffian Charles Entertainment Cheese are not allowed in my establishment. BEGONE I say
He's actually Irish and "Mickey" is a slur. His real name is William McMouse.