【back drop】 —a trampoline stunt in which from a bounce a gymnast lands on his back and then rebounds to an erect position:

• When doing a 【back drop】 it is very easy for the recoil of the bed to bring you back up to your feet.

【backdrop】 —

1. a cloth hung across the rear of a stage to serve as scenic background:

• The vast shuffle area is a stage, with theatrical lighting and backdrops rising as high as 85 feet.

2. the appropriate atmosphere for an event; the setting within which smth. is viewed:

• Indochina is the 【backdrop】 for this tensely written story.

See also: drop back / drop behind.