Worcestershire Sauce

Rarebit , is a roux-based cheese sauce that's typically flavored with something sharp, like mustard or Worcestershire sauce, and maybe spices, and beer or cider.

Admit it - you'd be just fine not saying 'quesadilla' out loud for the rest of your life. You could mumble the word at a fast food joint, hoping the guy working a 10-hour shift ...