(Not to be confused with actual douche/hygiene-maintenance equipment)
Someone who goes way beyond the normal, standard definition of an asshole. Usually used as a term to describe/direct one's anger (and in some cases, absolute rage) at someone who is pissing them off to a very high degree.
Synonyms: see ass clown, Assclown McDouche
"Sweet fucking Jesus tits! Look at this douche flap cutting me off!" Nice driving asshole!"
"Even though I have higher qualifications, Henry gave the promotion to that fucking douche flap Dave who isn't even here half the time!"