One who is so totally a
douchebag, that they can do nothing but act / perform every task as a
douchebag; they have progressed far beyond the occasional douche lapse, and have descended into excessive, abusive douche levels; similar to an alcoholic who can not stop drinking and is dependent on alcohol, this person can not stop acting/performing as a
douchebag. They are a douche-a-holic
A: I hate my
boss, he's such a douche
B: Oh yeah? No one is worse than my
boss, he's a douche-a-holic!
someone obviously cuts you off, turning in front of you when you have the right of way -
"You Douche!"!
then the culprit proceeds to flip you the
bird in the rearview mirror-
"Douche-a-holic!"