Wiktionary
big one
n. 1 (context colloquial English) something important; (context with 'the' English) the most important one, (context especially sports English) the big game, the big play 2 (context US colloquial English) One hundred or one thousand dollars. 3 (context US colloquial English) A dollar.
Wikipedia
Big One (roller coaster)
The Big One, formerly known as Pepsi Max Big One, is a steel roller coaster located at Pleasure Beach Blackpool in Blackpool, Lancashire in the United Kingdom.
Big One
The Big One, or Big One may refer to:
Usage examples of "big one".
By early afternoon a lot of clouds had begun to form on the horizon, and Mortimer reported a couple of big ones being blown in from the east, right toward Brake Hill.