Ill will is the amount of hate you generate from niggas around you
From "The Boondocks":
Riley: "I can't wait for niggas to start hatin', I can't wait."
Huey: "So you judge your success by the amount of ill will you generate from others around you?"
Riely: "Hey, if niggas ain't hatin' on you, you doin' somethin' wrong."
nas's record label named after nas's friend, will, who was killed . also can be used if one of your friends is killed you call them your ill will.
lets go start shit whit em wanna be thugs there.
na nigga they aint no wannabes, nd I dont want you to be my ill will.