n. Literally, the hollow, slender tube of a douche that is partially inserted into a woman's vagina while douching.
In the modern vernacular, a derogatory term descriptive of a disagreeable person whose personality is such that to tie it with the related epithet douchebag
is not sufficiently insulting or abraisive.
Gary didn't fill up the gas tank when he returned my car. Not only that, but he took my spare tire! That douchepipe is crazy if he thinks he can borrow my ride again!