Dope, fat, the bomb, the best.
Short for illicit
See also: sick
You see Iverson? Boy is so ill he makes medicine cough!
by Mo Hizzle December 28, 2004
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When Something is either really good or really bad, Someone who really like or dislike! It is all in the way it is said to define whether it is used in a nice or nasty manor!
1)"Heya, Jo have you seen Titch about tonight?"
"Urgh yeah I'm ill off her!"

2)"Awww man I saw Gem the other night, shez really nice"
"Oh yeah man I'm ill off her, shez mint!"

3)"Have you heard? Lisa Lashes tickets have sold out!"
"NO WAY MAN! I'm well ill off that"

4)"Last night was amazing!!!"
"Yeah I'm so ill off how good it was!"
by Loo_Poo August 23, 2007
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Meaning stupid. Contrary to popular belief, ill was first used by Run-DMC NOT the Beastie Boys
by nader's bitch March 5, 2005
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dangerously good, illicit, usually used to describe drugs chunes or booty
that bitches ass was on the ill-type!
by Junglistbadbwoii December 22, 2003
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totaly awesome pimpatude
by steven gibbons August 9, 2005
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phat or sumthin datz madd hot
I got da ill spinnaz on ma ride
by ~BrEeZy~ October 3, 2003
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