A derogatory term for a person missing both legs, usually that were amputated above the knee. It is referring to their remaining legs' shape and resemblance to pillows, with legs often taking rectangular shapes on the edges/corners of the "stump." This effect is more obvious when the pillow-legged person is not wearing prosthetic legs.
My grandfather has "pillow legs." He lost them in an accident.
Pillow Legs is coming over to watch the game. ,