douchebucket
A tosser who has become so intolerable, that douchebag is no longer adequate to describe their level of douche.

Generally speaking, one is a douchebag before they graduate to douchebucket, but some losers can go straight to bucket level (See: @ChrislHayes)
Smitty: Dude, I smashed my brand new flat screen with a brick!

Leroy: Why da fuck did you do dat?

Smitty: I was watching MSLSD and that little twerp in woman's glasses was yammering and I lost it.

Leroy; That muhfuh is a douchebucket.