noun
dessert stomach; room for dessert
Humorous or colloquial expression for having a separate appetite for sweets even when full from a meal.
お腹いっぱいでも、別腹でケーキが食べられる。
Even when I'm full, I can eat cake because I have a separate stomach for dessert.
彼はいつも「別腹」と言って、食後にアイスを食べる。
He always says 'dessert stomach' and eats ice cream after a meal.