"I once worked in a midwestern grocery store deli and I was trying to explain to a woman that the name brand and generic brand of the macaroni salad that we carried were in fact identical. The woman yelled at me saying she could only have the generic brand because “one is made with mayo and the other is made with mayonnaise and I don’t like mayo”. When I tried to explain that mayo is an abbreviation of mayonnaise, she just said “I’m from the south, I know my food” and tutted away."