To short-sheet a bed is an old trick. You fold the top sheet so it only goes halfway down. The bed looks neatly made. When someone gets in and tries to stretch their legs, they hit a wall of sheet and cannot lie down properly.

To short-sheet a bedshort-sheet一張床 is an old trick是一種老把戲。You fold the top sheet你把上層床單摺起來, so it only goes halfway down只鋪到床的一半。The bed looks neatly made床看起來鋪得整整齊齊。When someone gets in等有人躺進去, and tries to stretch their legs想伸腿時, they hit a wall of sheet就會頂到一堵床單牆, and cannot lie down properly沒辦法把腳伸直。

It is a joke, usually among friends — in camps, dorms, or on trips — not something you do to a guest you want to be kind to.

It is a joke這是個玩笑, usually among friends通常是朋友之間開的 — in camps, dorms, or on trips在營隊、宿舍，或旅行的時候 — not something you do你不會這樣對待 to a guest you want to be kind to一個你想友善對待的客人。

Though actually, many younger people have never heard the name, even if they know the trick. It is informal home and camp English.

Though actually不過其實, many younger people很多年輕人 have never heard the name從沒聽過這個名字, even if就算 they know the trick他們知道這個把戲。It is這是 informal home and camp English居家和營隊用的口語英文。

You short-sheet the bed, or you short-sheet someone (you do it to their bed).

You short-sheet the bed你可以說short-sheet一張床, or也可以說 you short-sheet someoneshort-sheet某個人 (you do it to their bed)（意思是對他的床動手腳）。

It has nothing to do with a sheet of paper, and it is not a hotel word for a small bed.

It has nothing to do with它一點關係都沒有 a sheet of paper跟一張紙, and而且 it is not也不是 a hotel word for a small bed飯店用來指小床的詞。