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3.
Slang;
When someone or something is very awesome.
Ryan: I failed this test!

Ethan: Well, i got perfect.

Ryan: wow, sicky bro
by metropre April 25, 2011
 
1.
To take a day off work
I'm feeling crook so Iam going to take a sicky
by Peter Brussey September 01, 2003
 
2.
Most commonly shouted in an obnoxious manner during an uncomfortable situation in order to express frustration in an extremely sarcastic manner.
(after a night of binge drinking)

Greg: bro, what a night.
Will: I can't feel my face..sicky.
Greg: listen I gotta tell you something man.
Will: sup?
Greg: I was really shitfaced and I boned your girlfriend while you were passed out.
Will: what?!
Greg: sorry bro..
Will: ...
Greg: we still cool, right?
Will: SSSIIIICKKKKKYYYYYY!!!!!!!!!!!
by Iddy McFiddy August 06, 2011
 
4.
A term used to express something exceptional.
Daaamn bro, this crow is kinda sicky
by Liquifux August 05, 2004
 
5.
Derivative or diminutive of sick or ill.

A way of speaking used to indicate sickness in a cute way; amongst friends and family members (esp when small children are involved).

Sicky can be interpreted both as being physically ill, or a mentally warped idea; but the majority uses the word to describe physical illness.
It's cold outside, and I'm feeling kind of sicky today!
by NameGameTameLame December 15, 2010
 
6.
Vaguely frat slang for "good," usually of the drinking-and-hanging-out kind.
That YMCA rummage sale was sickies!
by FredMeyer October 26, 2005
 
7.
A person that is sick all the time
Stacey is a sicky.
by Non-Sicky March 22, 2011