or all you can eat lol
all you can eat is not actually all you can eat
all you can eat is not actually all you can eat
Really though, I find that buffets are all-you-can-eat with the asterisk that you can't stay more than a certain time (usually 90-120 minutes?) and that you can't take any home.
I don't remember who did it but I recall a skit that went the other way. Someone went to an all you can eat restaurant and to their dismay discovered it meant all you can eat. The restaurant would not let you leave until you could no longer physically eat any more.
I was never charged more because they decided I was full. Certain restaurants have a "no food waste" policy that will make you pay the stuff that you don't eat.