wedge
A haircut that has a "step" in it at about ear height round the back, so that instead of tapering from long to short the transition was sudden. Inexplicably fashionable for a short period in the early nineties, up until a few days before I had mine done.

Also see: Mackenzie Crook’s hairdo in The Office. And the rhyme "There’s a BAS-in errigATION, and it’s RUINING the NATION." (Errigation sounded like an important word at the time. It was intended to mean "trend" or "epidemic". It actually means, um, nothing. I made it up.)
written by excluded pupil, approved by Susan