swish

Concise Oxford English Dictionary © 2008 Oxford University Press:
swish/swɪʃ/

▶verb

• 1 move or cause to move with a hissing or rushing sound.

• 2 Basketball sink (a shot) without the ball touching the backboard or rim.

▶noun

• 1 a swishing sound or movement.

• 2 Basketball a swishing shot.

▶adjective Brit. informal impressively smart and fashionable.

– origin C18: imitative.