Noun: Do-sh S-woo-sh
A mid-length to long styled hair cut, popularized by "douche" frat guys, combed to the side to emphasize a fake sophisticated look. Side effects include a tourettes type flipping of the head to one size in order to restore the swoosh.
Ian: Did you see that Beta's haircut.
Mason: No. What was it?
Ian: He was totally rocking the douche swoosh.