it's brass monkeys outside

it's brass monkeys outside

The weather is extremely cold. Taken from the semi-vulgar phrase "cold enough to freeze the balls off a brass monkey" or its derivative, "brass monkey weather." Primarily heard in UK. Cor, it's brass monkeys outside tonight!
See also: brass, monkey, outside
Farlex Dictionary of Idioms.
See also:
  • brass monkeys
  • brass balls
  • Baby it’s cold outside
  • baby, it's cold outside
  • cold enough for you
  • cold enough for you?
  • catch (one's) death (of cold)
  • catch death
  • catch one's death (of cold)
  • catch your death