Top Definition
The act of defecating in one's sump pump. Aka the lower decker.

Holy shit!!! Someone took a dump in the sump!
by welster03 October 26, 2006
5 Words related to Dump in the sump

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.

×