In basketball, a swish
is the noise the ball makes going through the net when it doesnt hit the rim.
A mish is the noise the ball makes when its a fn airball and brushes up against the net but sounds like a swish. Comination of Miss and Swish. Hence the name.
Player 1: Dude, Nice shot.
Player 2: wtf you talkin bout. It was a mish.
Player 1: Damn sounded like all net. If we lose this game, you get an anal boot
you cock smooch