the big one

big one

1. Something very important that one has been working or striving to achieve or win. Used after "the." OK, boys, this is the big one—the regional championships. Today we put our months of hard work to the test. This deal is the big one. Our company's entire future depends on us securing it.
2. Something extremely catastrophic or devastating. Used after "the." Analysts are warning that the destruction caused by the recent earthquakes would pale in comparison to the big one that could be coming down the line. It was only a minor heart attack, thank God, but the doctors say he might not survive if he's ever struck by the big one.
3. slang A unit of one thousand dollars. Used in plural constructions. The landscaper said it would cost five big ones to replace the sprinkler system. I spent 30 big ones on this damned car, and it's given me nothing but trouble since the day I bought it.
See also: big, one
Farlex Dictionary of Idioms.

the big one

n. a serious heart attack, possibly fatal, especially if anticipated or dreaded. He survived the big one but kept on smoking.
See also: big, one
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • (one) could use (something)
  • cooking for one
  • drive (one) out of office
  • force (one) out of office
  • force out of office
  • give (one) (one's) head
  • give head
  • give somebody their head
  • give someone their head
  • 1FTR
References in periodicals archive
'Who heard about the Big One? Or more appropriately, who hasn't heard of the Big One.
RELATED: LGUs urged to develop own ecozones "They also recommended decongestion of Metro Manila by reducing its population density and incentivizing the economic activities outside of the region, as well as to require all agencies to submit their public service continuity plans should 'The Big One' occur," he said in a statement.
Seismologists said the Big One would be triggered by a movement in the West Valley Fault and is estimated to potentially kill at least 30,000 and leave destruction in Metro Manila.
'The Big One', which has been held in Farnborough, Hampshire for around 20 years, will hold a second edition of the show at the NAEC Stoneleigh near Kenilworth.
PAUL Scholes has summed up United's rivalry with Liverpool by insisting the clash is still 'the big one' despite the emergence of City.
"For us to keep going on an upward projection you have to get results right on the pitch, but things like the Big One give you that knock-on effect.
NEWCASTLE Falcons will play in front of a record home crowd on Saturday March 24, with ticket sales for The Big One at St James' Park passing the 17,000 mark a month before the game.
"And now he has the big one, so he is more than ready.
BOOKIES reckon Vautour's connections are "leaning towards the big one" after Willie Mullins' star chaser was yesterday cut to 11-2 (from 7-1) with William Hill for the Cheltenham Gold Cup.
Self-confessed rollercoaster hater Clark has promised to ride "The Big One" at Blackpool Pleasure Beach if he manages to keep the Seasiders up.
A MERSEYSIDE soldier who lost both his legs and an arm while on patrol in Afghanistan has abseiled from the Big One rollercoaster.
The Big One is the latest launch from McVitie's and is a Jaffa Cake of epic proportions.
All three will have their supporters in the big one next month and whatever happens today, I doubt it will have a major impact on the Champion.
If not the big one: As Karenin, Jude Law impressively shrivels into a cuckolded wretch.