A mouth with rotted out or no teeth due use of crystal Methamphetamine. Also may have scabs all over face an body. Meff Mouff is probably on how someone with the lose of or no teeth due to heavy usage of meth saying meth mouth.
Police officer: See this mug shot with the scabs al over and a case of the meff mouff?
by Kara-que June 26, 2021
Get the Meff Mouff mug.
a term originating in the 803 of lancaster south carolina.
it can have one of three meanings.

1, a girl with fucked up teeth

2, a girl whos face is ugly or un appealing

3, a girl who is such a whore she sucks dick all the time
that bitch ryan talking to got straight up meff mouff

(or) you know, dat bitch kay from central? she a meff mouff,
bitch ugly
by dylan lawing April 2, 2008
Get the meff mouff mug.