The sense here is about eating: stuffed means you have eaten so much that you could not take another bite. 'No dessert for me, thanks — I'm stuffed.' It is the natural, everyday way English speakers say this, far more common in speech than 'I am full'. It is informal but not rude, and it is used happily at a friend's table or a family dinner. At a very formal meal you might soften it to 'I couldn't eat another thing'. The feeling is usually pleasant and a little comic — you are pleasantly overfull, often after a very good meal. Notice the picture behind it. To stuff something is to push filling inside until no space is left, the way you fill a cushion or a toy. Saying you are stuffed treats your stomach the same way — packed tight. The same verb gives us stuffed animals (soft toys filled with cotton) and stuffing in a roast chicken, so this eating sense sits inside a family of 'filled right up' meanings. Grammar point: it works like a describing word here, with be or feel — I'm stuffed, we were absolutely stuffed. You cannot say 'I stuffed' to mean this. To say who did it, use the reflexive verb instead: 'I stuffed myself.' One warning for travellers: in British and Australian English 'get stuffed' is a rude way of telling someone to go away, and 'stuffed' can also mean broken or ruined. Those are separate uses — the food meaning is completely safe.

吃得很飽、撐死了（台灣口語「我飽到不行」「撐爆了」）。比 I'm full 更口語、更常用。注意英式/澳式的 get stuffed 是「滾開」的粗話，跟吃飽無關。