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1. Filthy, diseased, or otherwise dirty mouth

2. The actual mouth of, or just a reference to the level of disgust one should have for a prostitute or hobo's mouth

3. A dumpster dog's mouth, or a country dog's mouth after its been eating roadkill, especially if it's rabid and foaming
Razor keeps it real, he's okay with leaving a whore's trenchmouth all over his wang.
by staypuff August 29, 2006
A fungus you get after making out with too many people in one night. Common among sorority girls.
Connie gave me trench mouth at last Saturday's mixer, whore.
by mrducks December 18, 2003
Terrible bad breath! The kind that is so horrible it makes others turn away when you speak to them.
Bob's trench mouth made my eyes water.
by 9key October 18, 2004