What is Sick Whistle?
1.
The word "sick" is used primarily by teenagers and wannabees to mean "cool" or "fresh".
Sometimes is is said in a drawn out form for emphasis such as "s-i-i-i-i-i-i-i-ick".
It can also be used in mock "coolness" when someone falls or attempts to do something amazing and sucks instead.
A sick whistle is the act of saying the work "sick" twice in a row very quickly in a male falsetto voice.
"Sick Sick"
A "riced-out" Honda Civic drove past a group of older males and was subjected to a chorus of mock "Sick Whistles."
See 
Random Words:
1. 
A sex god, sex on legs, very sexy man.
Derived from the name of a sex god who called himself Zoddy
That man was totally zoddy! 
He wa.. 
1. 
a batty boy who reeks like shit
Lawn bowls, u stink!!..