What it means
Means you’re stuck on one idea or grievance and you won’t drop it. You keep bringing it up, having a moan, and steering every convo back to your pet topic. It can be righteous or totally petty, but either way you’re obsessed. The image is of a bee trapped in your bonnet, buzzing away and making you restless.
Usage examples
"He’s got a bee in his bonnet about the neighbour’s parking, keeps peeking through the curtains and leaving passive aggressive notes on windscreens."
"She has got a real bee in her bonnet about recycling lately, lectures us every single dinner."
"Ever since that documentary he has had a bee in his bonnet about quitting his job."
"Mum’s got a bee in her bonnet about the bins again, so now we’re getting a full TED Talk on what goes in which one."
"He got a bee in his bonnet over the office thermostat and somehow turned a lunch break into a one-man campaign."
Where it comes from
It’s been around in English since the early 1500s. Back then a bonnet was a hat or head covering, so the picture lands straight away: if a bee’s trapped in there, you’re not focusing on much else. That buzzing, fidgety image grew into the idea of a fixed obsession or nagging preoccupation.
