What it means
Used when someone suddenly stops making sense or overreacts, like they’ve wandered out of the storyline. You can say a person’s losing it, a meeting’s gone off the rails, or a plan’s turned into chaos. It can be serious, but it’s often cheeky banter when your mate’s having a wobble over nothing. Handy for office dramas and messy group chats.
Usage examples
"Our PM’s losing the plot, mate. He’s just fired off an all-caps email about the biscuit budget, CC’d his mum, and signed it Kind rage regards."
"The boss completely lost the plot when the printer jammed, started shouting at a machine like it could hear him."
"I have been awake since four, I am losing the plot here, can someone just hand me a coffee before I cry."
Where it comes from
It comes straight from storytelling. If you lose the plot of a book or a film, you have no idea what is going on anymore, so by the eighties Brits started using it for people too, the moment someone loses the thread of their own sanity and starts acting all over the place.
Other ways to say it
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