a "satchel" is a really big bag... of "douche". So someone who is a really big douche bag, would be a "douche satchel"
an expletive, used in instances of anger/frustration
That guy almost hit me with is car, DOUCHE SATCHEL!
A douche mop who continues to be a low level pain in the ass.
kitters53: lol bad call
NoahRC: I liked my odds but I know what you mean
kitters53: because you don't know how to play
NoahRC: you are a complete douche satchel