A meter rating a swamp donkey on a 1-10 scale. Relates to the 1-10 scale of the hottness meter but rates how ugly/fat these girls really are. 1 being the least ugly/fat 10 being the most ugly/fat. A 1 on the swamp donkage meter is not to be confused with a 1 on a hottness meter, as a swamp donkey is much much worse.
The act of bending over, and raise your tail- or just to pull down your trousers- and to let your feces (poop/shit), fly out and smack someone else in the butt hole.
The Verb form is "Donswaguhduhdunfin'" And that is a war between two people, who like to Donswaguhduhdunf.
Taylor: OH MY GOD IS YOUR DOG ABOUT TO---?
Krista: YES I BELIEVE SO---
*feces flies out of the dogs anus and smacks the swing set*
Taylor: SHIITTTTT Your dog just was DONSWAGUHDUHDUNFIN'
Krista: Yessss, let's go donswaguhduhdunf with him!