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Comes from the latin words moooretarded, and syyyisdumb, which means to be dumb. see stupid.
psh, Becky, don't pull a mo0sy, now.
mo0sy by le raerae. May 13, 2005
Related Words
One or something that seems brilliant, in style, and considered vogue to peers
WOAH! That's SO mo0sy!!!
mo0sy by Farrah March 21, 2005
Meek, timid, subtle in emote or presence, shy, avoiding attention or confrontation.
Do you remember that mousy girl, Erin? She was the extra shy one with glasses that sat in the back of our third period English class. The girl that always looked at her feet, and barely ever said a word to anyone. She owns some hotshot law-firm now and drives a Porsche.
mousy by AutumnsSplendor April 2, 2016

mossy wang 

1.The hammer used by the syndicate project in feed the beast which removes a 3x3 area of stone. Mossy wang is now also another catchphrase used by the syndicate project.

2. A penis that hasn't been touched or cleaned for years and has grown moss on it.
1. I just made the mossy wang in feed the beast.

2. You have a very mossy wang! Clean it!
mossy wang by LOL:):) April 18, 2014

Mossy Bank 

What Dr. Arden called a prostitute's vagina in American Horror Story
Dr. Arden - " Show me your mossy bank "
Mossy Bank by Wolfgangxbang December 31, 2017

mossy bank 

a wet add pussy off a fake nun
Show me your mossy bank -Dr Arden
mossy bank by ahsobsessed April 4, 2021