dumpdown 

A very large amount of snow.

"I can't come to work today, there has been a dumpdown and I am snowed in."

dumpdown by Adele Wolfe July 20, 2008

dampdown 

To urinate yourself whilst heavily inebriated, usually whilst passed out.

Gerry, if you crash here tonight, you're not gonna dampdown are you?
Nah, I've only had two pints.

dampdown by Johnny Mindless September 5, 2007

dump down 

to excrete fecal matter.

what else would it mean?

also referred to as "double d"

i need to dump down is the most urgent way.

i need to double d... now.
what?
dump down.
oh... weak. ok fine. you can use my bathroom.

dump down by ckslick March 7, 2010