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1.
A person with an abnormally small mouth.
Did you see that girl Erika? She has such a cat mouth.
by Hanginaloveschristophe May 25, 2010
 
2.
The emote, :3
Catmouth is a fine way to teach our children about economical issues and government policies. :3
by Buttsechs McGee October 15, 2008
 
3.
when ur cuddling ur girl and her hair gets all in your mouth, and you make a silly face and splutter like a cat.
i was lying in bed with suzie when her hair went in my mouth, it gave me a really bad catmouth
by matty boy November 30, 2004