Borderlands TPSSwagman

TVHM - Name: Outcast
UVHM - Name: Moondowner

He also spawns in Stanton's Liver, but Outlands Canyon is a faster and easier farm.
In both locations he spawns 100% of the time.

Swagman drops 0 to 2 Wet Weeks upon death.
The Chances below account for potential duplicates.