n. : Unusually large deposit of fecal matter after a long absence of bowl movements, typically followed by an overwhelming sense of relief.
'Yo, I ain't pooped in a minute but I just had this crazy slamdump'.
by Mike Cooney January 30, 2008
To defecate inside another human being's anus.
I got you Sharon! Right in there! SLAM DUMP!

Last night Steven took it upon himself to slam dump inside me. It was pleasant.
by Bruce Fidler November 05, 2007
The act of having a bowel movement that is so urgent and formidable that the individual grabs the toilet rim with two hands and vocalizes a sound similar to that of an NBA star who just dunked a basketball. Ie: "Ahhhhhhhhhgh"
Lebron James ain't got nothing on the two handed slam dump I just made in the teachers lounge toilet.
by Jimmy frank February 13, 2014
The immediate release of poop as soon as you sit on the toilet after holding it in for a while or after eating too much. Just like a slam dunk, only done with the ass.

Having to take a shit real bad
I went to go eat with a friend the other day. When we go back to the dorm he scurried to the bathroom, taking small but quick steps. Seconds after he shut the door I heard him shout "slam dump!"
by Dr_Girafales April 20, 2011
when you have to take a dump really bad and you get to the toilet and you start to shit before you even sit down, but you still make it
Mike: OH SHIT! i think im running to a SLAM DUMP
by shailah February 20, 2007

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