When you have the worst diarrhea of your life and should not be further than 4 seconds from a toilet. This mainly happens after eating at Willies's Grill and Ice House, but can happen at any eating establishment. You will think you have got it all out of your system, but once you stand up from the toilet, your stomach tells you its time to go again.
Boy 1: Hey let's go eat at Willie's
Boy 2: Nah man that gives me Willie's belly
by bozzbaby June 1, 2017
Get the Willie's Belly mug.