Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

lose it

informal

Definition

to stop being able to control your emotions and suddenly start to shout, cry, or laugh: I'd been trying so hard to stay calm but in the end I just lost it.Expressing and showing feelings
(Definition of lose it from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)