Backboard

[Dave Paprocki]

A board which supports the back wen one is sitting;

[Couch Potatoe]

The upwards-facing [flat] [plane] of the [penile shaft], when in boner form.

[Rihanna]

Backboard in Basketball. Supports the basket, and normally made of hardwood or clear plexiglas. It can measure either 6 x 4ft or 6 x 3.5ft. The bottom and sides of the board are normally padded to prevent injury to players when jumping up to score a basket.