the.com/hothead

Someone whose thermostat for anger is permanently set to broil.

means A person who gets angry quickly and acts rashly or impulsively when provoked.

from A straightforward compound of 'hot' and 'head,' built on the ancient metaphor linking heat to anger and passion — we still say tempers 'flare,' blood 'boils,' and people 'burn with rage.' The word has been in use since at least the 1600s, riding on the same heat-equals-emotion logic found across many languages, long before anyone understood a thing about actual body temperature.

origin era
temper linked to literal body heat since 1600s
biology myth
anger does not actually raise core temperature
classic trigger
minor inconvenience, major eruption
workplace label
usually means talented but exhausting
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