To be in your bag

American Slang

Definition

To be fully in the zone—confident, focused, and performing exceptionally; or, in some contexts, to be deeply in your feelings or moody.

Examples

"She was in her bag during the fourth quarter—draining threes, locking down on defense, and taking over the game."

"Ever since he started that new project, he’s been in his bag, cranking out ideas and leading the team like a pro."

"After the breakup, I’ve been in my bag all week—listening to sad songs and dodging everyone’s texts."