Top Definition
to insult or humiliate someones in public without them knowing.

the use of slang/code words or terms to insult someone who doesn't understand them.
"i downmouthed mrs. brooks so badly yesterday. the class was laughing and she didn't understand shit."
by vamp9r April 27, 2008
1 more definition
A vagina, slangily.
"Will you french me on my downmouth?"
"Nah baby you know that I don't roll like that."
by Russia is HERE May 27, 2008

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