Best definition
zwoosh
used after someone is totally pwned. Usually said after zwah and zing have already been called. While saying this one

must use a hand motion of what they percieve to be a “zwoosh.”

Usain: Yo man, I am faster than any other guy in the world.

Matt: Yeah thats what your girlfriend told me. ZWAH!!

Zach: Zing!

Randy: Zwoosh!!! (insert hand motion)