Supper may refer to, on largely class-based distinctions, either a late-evening snack (working and middle class usage) or else to make a distinction between "supper" as an informal family meal (which would be eaten in the kitchen or family dining room) as opposed to "dinner", a generally grander affair (either or both in terms of the meal and the courses within the meal itself), which would be eaten in the best dining room, could well have guests from outside the household, and for which there might be a dress code.
Yeap LOL
Just give me a steak sandwich and a crackling cold bottle of beer poolside and I’ll call it good.