out of one's system

Definitions

1. Eliminated from one's disposition, mindset, or concerns.
   often
2. Physically eliminated from the body.
   literally

Examples

“Regular exercise might help⟳ you to get⟳ the anger out of your system.”

“I feel⟳ like⟳ you sow⟳ your oats when you're young, and then you just, you know⟳, you get⟳ it out of your system.”

CEFR level