Josh: Mine does too!
Me: Time for a Double Dump! Bring your beer!
Furthermore, the first Portion stinks more as it has festered inside you for some time.
Why is that, Falvey?
Oh, I have to have a double dump.
You will be a while, make sure you spray!
dude, it's been half an hour and still smells. that must have been some serious double dump you did.
Usually accompanied before and after by groans of "oh god" "never again" or "oh shit" and requires someone else to clean up the mess as the double dumper is too worn out to do much more than wipe their ass.
One girl says to the other...
"yo girl i just did a double dump"
"OOoo that nasty! i hope you washed your shity hands" replies the girl.