Greg: bro, what a night.
Will: I can't feel my face..sicky.
Greg: listen I gotta tell you something man.
Greg: I was really shitfaced and I boned your girlfriend while you were passed out.
Greg: sorry bro..
Greg: we still cool, right?
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.