Red Sea pedestrian noun a Jewish person UK Offensive, intended as jocular; from the crossing of the Red Sea (Exodus 14: 21–22).
BRIAN: I’m not a Roman, Mum, and I never will be! I’m a Kike! A Yid! A Hebe! A Hook-nose! I’m Kosher, Mum! I’m a Red Sea Pedestrian, and proud of it! — Monty Python, LifeofBrian, 1979