some one whom has the characteristics of a douchebag but exibits said charicteristics in such large quantities that the metaphorical "bag" is insufficient
"I may be a douche bag but Kennie's a Sack-o-douche"
a derogatory term used in place of douche-bag, lends an air of immaturity to the insulted, can backfire and make the insulter sound retarded, use with caution.
John replaced the medium sized Trojans Chad had in his drawer, with Safeway brand Extra-Small. When Chad brought home a soroity girl and brought out the package, she thought that wrapping would be too small for her pleasure. She left and he had to masterbate by himself. As funny as that is, John is still a douchesickle.
The highest form of a douche you can get. You have the first stage which is a douchebag, the second stage which is a douchenozzle (slightly more annoying than a douchebag because the nozzle is actually inserted into the vagina), then you have the douchebackwash which is the highest form of a douchebag that you can get/be...because the backwash is the dirty drainage that drips out of the vagina to clean it, thus worse than the bag or nozzle. Used to describe a super super super douchebag.
That guy jus got his car totally tricked out on "Pimp My Ride" then a week later he gets in a wreck an totally demolishes it. He's ok an everything but he's gotta feel like such a douchebackwash for destroyin that slick ass ride"