Ill

[PussyCat]

cool, tight, sweet

[Jessica]

1. Adj. Feeling under the weather, as with a cold or the flu.
2. Adj. Having great skill or skills with respect to a particular endeavor.
3. Adj. Being particularly depraved, usually with respect to ones selfish pursuits or the manner in which one treats others.
4. v. A more fashionable version of the verb to chill, i.e., to relax, lounge, to hang out.

[Tanya Shivari]

1. means [Dope], [cool], [tight], [raw], [phat], etc.....

2. To be sick

[Becky]

OFF DA HOOK.

Urban Dictionary

[Donald Trump]

amazing; totally awesome; the best

[Jessica]

1. means [Dope], [cool], [tight], [raw], [phat], etc.....

2. To be sick

[Rihanna]

its like saying sweet, cool or sick

[Mark Zuckerberg]

Contrary to most of the definitions found here, this is the correct one:
ILL : Adjective meaning wild or crazy. Not always derogatory, but used when something may be so outrageous so as to be unruly.
ILLIN: Adjective or Verb. Lunatic behaviour. See above.

[Becky]

Cool, pimp, mack.