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8.
the sound a turd makes when hitting the water in a toilet bowl.
the poop went clump
by Anonymous September 18, 2003
 
9.
The act of hitting someone
If that chief don't show up with my money he's gonna get a clump in da face ya know
by sy662 February 02, 2009
 
10.
To fill cover or fill with jizz.
i got crazy after that porno and clumped my car.

i totally clumped her face both ways.

she got clumped from the neck down.

i cant believe i clumped the entire fish tank
by Kirkdog and Jizzmaster May 21, 2010
 
11.
The act of clinging and humping at the same time.
When I see Maxi, I'm going to clump him
by Anonymous July 29, 2003