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A computer program that creates animated characters who walk and crawl along the sides the monitor, perform a set number of animations, and multiply. Popular among Japanese anime and game fans, who create shimeji programs for popular characters. The name comes from a fast-growing breed of Japanese mushroom.
I left my K-ON shimeji running, and when I came back, the entire screen was full of Mio and Yui rocking out.
Shimeji by Annoying_Otaku October 6, 2010
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Cute things that you can download that walk all over your screen and can multiply. You can get little characters from your favorite show or thing or whatever too.
I have Ice queen from adventure time shemejis that walk and climb and awwww ^_^
Related Words
A degenerate human being. Mostly a weeaboo with no bright future.

Shimeri is a person with many mental disabilities.
"Hey did you hear about Shimeri?"
"Yeah, I'm moving to Mars."
Shimeri by Shimeri June 20, 2017
A feminine name. Meaning Undifined beauty or known for her fame.

Shimei shone with extravagant beauty
shimei by Alex725 June 6, 2018

shimerick 

A limerick that is not very good. A merger of the words shit and limerick
That really was a shimerick, Bob, write another!
shimerick by kentmusicman August 29, 2006
A cute catgirl that likes traps. A shimeri is often considered to be a sweet person
Oh wow that person shared their trap porn with me, thats so Shimeri of them!
Shimeri by Meme Culture June 22, 2017

Shimeria 

A girl you should definitely have as a friend or girlfriend. She will have your back no matter what. There is much more to the name SHIMERIA it is a very unique name for a girl there is only one girl in the whole wide world with the name SHIMERIA.
My very best friend Shimeria is nice.
Shimeria by Measia November 20, 2023