1 definition by Grahamfw

Top Definition
The point at which critical mass of the ass is reached, prompting one to immediately find a bathroom and empty contents of said ass; esp. problematic for the work dumper who would rather get paid to defecate but instead has to take care of business before leaving the house.
Graham: I reached critical ass this morning and was 20 mins late to work.

John: Critical what?
by Grahamfw December 07, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.