cool, rad, mental, mad...

Origin: Bankstown, Sydney

Other handy examples:

Interesting, cool, new. (variant of sick)

Sik is a street term which means something that is good

1. Rad, cool, happening

2. Ill

3. A word said by fiftys chavs with lisps

New name for popular texas holdem hand - 93 off suit. named after player Sikulu after stating "watch this smooth move" and proceeding to lose all his chips with this hand. this name has now reached infamy with most players on the pokerroom.com site

turkish word. It means fuck, cock.

A person who is rather shady. You can't really pinpoint what's so sketchy about this person, but you know to keep an eye on them because they are always doing something sketchy.