3x3 basketball

Short definition from Wiktionary

Noun

1. 1
   A coach-less (no in-game coaching) form of basketball, with 2 opposing sides of 3 on-court players at a time on a side, on a court with a single basket, half the size of a regular basketball court, where defenders and attackers switch during play.
2. 2
   Alternative form of 3x3 basketball.