1 definition by DeeTown
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
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 7, 2008