Arts & Culture The Naughty Etymologist The Naughty Etymologist 01-17-2020 By Jacqueline Gerber Published January 17, 2020 at 7:39 PM EST Facebook Twitter LinkedIn Email Listen The rude-sounding word for Friday, Jan. 17th, is a medieval ancestor of the trombone. No doubt some brass-playing WCLV listeners have an example in the closet.