ill
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
To behave aggressively.
Register: dated, slang
Where it’s used:
Used
American English
Examples
D.M.C.: You been illin' lately.
Run: So, I'm illin'. Am I illin'? Chillin'! You know what I'm sayin'? Chillin'.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “ill” mean?
To behave aggressively.
Is “ill” formal or informal?
ill is generally dated, slang.