all-or-nothing wager
nounUK /ˌɔːl ɔː ˈnʌθɪŋ ˈweɪdʒə/
US /ˌɔl ɔr ˈnʌθɪŋ ˈweɪdʒər/
A bet where you win everything if you are right or lose everything if you are wrong.
He made an all-or-nothing wager on the final race.
OTHER MEANINGS
2. A risky decision in which there is no middle result.
Quitting his job to start a company was an all-or-nothing wager.
3. A situation where success brings total reward and failure brings total loss.
The championship match felt like an all-or-nothing wager for the young team.
4. A bet in which the stake is either doubled or lost completely.
They agreed on an all-or-nothing wager: winner takes the whole pot.