Top definition
Mr. Roundmouth is a slang term for your butthole.
Dang dude, I am never drinking that much again. Mr. Roundmouth was puking all morning and I couldn't get any sleep.
by Willy Wig January 10, 2012
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug