meltdown

noun
melt*down \ ˈmelt-ˌdau̇n \
1956{ds||1||}
  • the accidental melting of the core of a nuclear reactor
  • a rapid or disastrous decline or collapse
  • a breakdown of self-control (as from fatigue or overstimulation)

melt down

verb
melt down \
1956
  • to suffer a meltdown : collapse
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