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Generally used to describe someone who seems to be showing signs of either mental retardation or severe stupidity and may need medieval assistance.
What? You ate your own homework? Stupid mimsy!
Mimsy by MasterSkeetman April 3, 2017
A "mimsy" is a person of questionable mental capacity or a person who make poor logical decisions

Named after the popular television character Mimsy form the South park series
That kid is such a Mimsy

National Mimsy day is the 24th of feb
Mimsy by Lord lid February 18, 2021
1. A pussy (figuratively).
2. A pussy (literally).
"Stop whining and do it, you mimsy."
mimsy by a sentient bag of goon April 27, 2025

fetid mimsy

i dont know you that well but can i poke ur fetid mimsy ?
fetid mimsy by connor March 13, 2004

butters mimsy 

A butters mimsy is a detritus riddled skanky hoe's vagina.
Check out Dave's Mom, I saw that filthy bitch wanking on webcam and she bas a right butters mimsy.
butters mimsy by Matty Stoneman February 21, 2018