apple pie bed
Another term for short-sheeting, a practical joke where the lower sheet is folded back--effectively halving the bed's length--and placed under another blanket to disguise what has been done. The victim, often the joker's roommate, is meant to climb in, find him/herself unable to actually lie down, and look like an idiot.
Frank Zappa (shouting at his roommate after supposedly falling victim to one): This is an apple pie bed too far, Don!