lose it

verb loses it · losing it · lost it

1. informal To become explosively angry; to lose one's temper. When my dad found out I had failed the exams, he just lost it.
2. informal To feel devastated, or distraught, especially when one's sadness is overwhelming. When she heard the news about her cousin's death, she lost it.
3. informal To begin to laugh uncontrollably. When the teacher's chair broke, the class completely lost it.
4. informal To lose one's mind, go crazy.
5. informal To cease to have a skill or ability, to lose one's touch, to be washed up. When you think about all she's done for the sport, it's kind of sad, but she's completely lost it over the past few years.
6. idiomatic To lose control of a situation. Charlie is seated in a wheelchair, his head face down on the tray, food and liquid strewn all over the floor and nearby counter. He appears to be unconscious. His feet and hands are swollen far beyond normal size. Horrified, I say his name softly. He doesn't stir. […] Later I'm told he'd "lost it" —
7. Used other than figuratively or idiomatically: see lose, it. ‘I’m Inspector Harper, Leeds police. Where did you lose it?’ / ‘Lose it?’ He laughed. ‘I’d never lose this. It was stolen.’