1 definition by DeeTown

Top Definition
The feeling left in the mouth and throat after a heavy nights drinking. Impossible to brush out, eat out, sleep out or get rid of in any way.
Rob: Alright Olli, what you get up to last night.

Olli: Got fucking rat assed on vodka at some party then like passed out on some girls bed.

Rob: Sounds heavy

Olli: Yeah man I have serious rat mouth right about now
by DeeTown November 07, 2008

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