fadeaway

Short definition from Wiktionary

Noun

1. 1
   An instance of fading away, of diminishing in proximity or intensity.
2. 2
   A jump shot made while jumping backwards, away from the basket, with the goal to create space between the shooter and the defender, making it much harder to block.
3. 3
   The ending of a personal relationship by stopping any contact with the other party and not providing an explanation.