Lose it
/luːz ɪt/informalUK · US
What does “Lose it” mean?
Lose it means to suddenly lose control of your emotions, for example by shouting, crying or laughing.
Someone who “loses it” might shout, burst into tears or laugh so much they cannot stop. The situation tells you which reaction the speaker means.
“I'm losing it” can also mean feeling confused or unable to cope. Saying this about someone else can sound unkind, especially if they are struggling.
When do people say it?
Use it in informal conversation when context makes clear which emotion became overwhelming.
“I tried to stay calm, but I lost it when he blamed the children.”
Is it formal or informal?
Register: informal. It is most at home in everyday conversation rather than formal writing. Most common in UK and US.
Where does it come from?
The “it” is not a missing object. The phrase treats control of your emotions as something you can lose.
Origin confidence: Disputed; treat with caution
How do you say “Lose it” in other languages?
Related idioms
- Fly off the handle, Suddenly lose your temper.
- Pull yourself together, To calm down and regain control of your feelings.
Last updated 2026-09-16