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1.
v. To clean a piece of cookware by water only. Afterwards, drinking the water.
"To conserve water on the camping trip. The group sumped their dishes."
by TC October 12, 2004
 
2.
The sump is a place in East Williston were you can only go if someone who goes there invites you. You hangout there and get drunk/high. Its a HUGE fenced up big hole in the ground with lots of trees.
I was at the sump last night with the gang and man did we had FUN.
by Ravenn May 31, 2007
 
3.
A large bowel movement, especially following a night of heavy drinking.

From: "sweaty dump"
I'll see you later, time for a sump.
by black pasta September 18, 2010
 
4.
camel toe, vigina in tight clothing
look at the sump on her,looks like a dolphins nose
by Neil squires & Brian kirk February 29, 2008
 
5.
Another slang word for Anus.
Fucked that sheila last night in the sump.
or
You love it in the sump you dirty prick!
by TJ Aisthorpe June 20, 2006