When morons who can't spell try to say douche bag, they say dush bag. Although, ironically, these people could, properly, be called dush bags. The term dush bag is most commonly used in eastern Connecticut, by intermediate school children who were raised poorly by illiterate parents. Often said by little hyper brats with lisps.
Moron: Like, omagod, you are SUCH a dush bag.
Man: What the hell is a dush bag? Do you mean douche bag? You're such a dush bag.