a person that is super douchey, like double the douchiness
of a normal douchebag, hence the contraction of deuce and douche. The pronunciation of deuche is similar to douche, so no distinction can be made when merely heard. One might specify that they are calling someone a "eu" deche
rather than an "ou" douche, but in doing so, this makes that person even more douchier
as well. It just spirals into one douchier circle with no escape. In fact I should stop typing now.