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1.
a word meaning alot of, or very.
monica and joe are mucha sexy
by monica r January 20, 2008
 
2.
A small moustache grown during puberty.
Take a shave, mucha man!
by Flexar June 17, 2011
 
3.
A word to disguise marijuana.

The last name of Alphonse Mucha a nouveau artist from the late 1800s to early 1900s.
"dude grab the bag of mucha"
"this mucha is going to taste awesome"
"its mucha time"
by knotsandivy January 07, 2010