The literal meaning refers to dangerously cold temperatures, as described in Jack London's story "To Build a Fire". In practice, it is used as slang to describe the weather on a particularly cold winter day.
It's jack london cold, man. It's gotta be below zero out there.
by Svenllama February 08, 2007
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.Buy the mug
Can you define these popular missing words?