Definition of big chill in US English:

big chill

noun

North American
informal
  • 1A spell of extremely cold weather.

  • 2A numbing and depressing sensation or influence on the feelings, a damper.

  • 3Death; mortality.

Origin

Early 20th century; earliest use found in The Syracuse Herald. From big + chill.

Pronunciation

big chill

/ˌbɪɡ ˈtʃɪl/