big one

noun

, Slang.

1. a one-thousand-dollar bill or the sum of one thousand dollars.

Word History and Origins

Origin of big one¹

First recorded in 1955–60

Example Sentences

But Democrats and immigration experts are warning there is a price tag, and it's a big one.

From Salon

The big one to watch out for, however, is that I think Trump and the Republicans will have their eyes on privatizing Old Age Insurance, what we commonly call Social Security.

From Salon

First thought: This is the big one.

From Los Angeles Times

That’s when I was like, I’m really doing my big one because that brings something that I know they’re not gonna be able to find anywhere else.

From Los Angeles Times

Are you ready for when the Big One hits?

From Los Angeles Times