interjection
thanks for the meal; that was delicious
Colloquial, casual version of ごちそうさま. Used after eating, often in informal settings.
See also: ごちそうさま
「ごちそうさん!」と言って、彼は席を立った。
He said 'Thanks for the meal!' and left the table.
母の手料理に「ごちそうさん、おいしかったよ」と伝えた。
I told my mom, 'That was delicious, thanks for the meal,' about her home cooking.