Dumphump 

A dumphump occurs when you bang a chick while you're taking a dump. Shitting, wiping your ass, and then banging while sitting on the toilet is not considered a dumphump. You have to be in the process of shitting while banging for it to be considered a true dumphump. If you can time it out so that you blow a load as a huge turd is coming out, that feels great. A dumphump does not have to be performed on/over the toilet. You could fuck your girlfriend from behind and shit on your bedroom floor while doing it, and that would be considered a dumphump also. Basically, if you're shitting anywhere, while banging a chick, that is a dumphump. It's a little known fact that 32% of women have more intense orgasms when they are breathing in the smell of shit. If you haven't tried the dumphump yet, try it soon.

Todd: "Did you nail Rebecca yet you dirtbag?"
Ron: "I did more than bang her little guy, I dumphumped her at that frat party."

Dumphump by John Planet October 8, 2008

dumpbumps 

a form of the goosebumps you get while taking a long awaited or very pleasing dump.

Jim:(Upon hearing cries from the bathroom) "Jeff are you okay"? Jeff: I'm fine. That one was so good, I got the dumpbumps!

dumpbumps by Billy Numer May 1, 2008

take a dump hump 

the hump dogs form in their backs when preparing to pinch off a giant loaf.

uh oh, kylie's got the take a dump hump, better get her outside quick!

take a dump hump by CGPinFL June 16, 2011