big one

noun, Slang.
1.
a one-thousand-dollar bill or the sum of one thousand dollars.
Origin
1955-60
Contemporary definitions for big one
noun

a large sum of money and, by extension, anything regarded important and substantial

noun

a major natural or unnatural disaster, such as a world war

Slang definitions & phrases for big one

big one

noun phrase

A thousand dollars, esp as a bet: The