What it means
To have a meltdown means to totally lose it when stress, frustration, or one last tiny thing pushes you past your limit. It can be crying, yelling, snapping, panicking, or just going full emotional shutdown with extra fireworks. You hear it for kids, frazzled adults, and anyone making a scene because their brain's tapped out.
Usage examples
"Dan had a meltdown when the chippy forgot his curry sauce, proper red in the face, having a strop like it was wartime rations."
"She had a complete meltdown when the wifi went down during her presentation."
"The toddler had a meltdown in the supermarket over a packet of sweets."
"I nearly had a meltdown when the self-checkout froze and I'd already scanned a full week's shop."
"He had a proper meltdown over the group chat changing the plans again, fully pacing round the kitchen and muttering to himself."
Where it comes from
It comes from nuclear meltdown, where a reactor overheats so badly the core starts to melt and the whole situation goes into disaster mode. By the mid 20th century, people were using it figuratively for emotional collapse too, meaning someone gets overwhelmed and falls apart in anger, tears, panic, or stress.
