“Double down” means to commit fully to a risky choice, from blackjack where you...

https://www.cool-bookmarks.win/double-down-comes-straight-from-blackjack-where-you-double-your-bet-after

“Double down” means to commit fully to a risky choice, from blackjack where you double your bet for one last card. Learners often think it’s about hesitation or withdrawing—actually, it’s doubling effort, not backing off