A guide to understanding this common English expression
The phrase “be on something” is an informal English expression with a few different meanings depending on context. It’s commonly used in casual conversation and pop culture.
1. Taking medication:
“She’s on antibiotics for her infection.”
2. Using drugs (often illicit):
“He seemed strange—do you think he’s on something?”
3. Focused or working on a project:
“I’m on a new marketing campaign this week.”
4. Performing or appearing (e.g., TV, stage):
“Are you on the podcast next Tuesday?”
In movies and TV shows, “Are you on something?” is often used humorously or suspiciously when someone acts unusually. Meanwhile, “I’m on it!” (a related phrase) means “I’ll handle it,” showing eagerness to help.