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

https://camilassplendidblogs.raidersfanteamshop.com/can-i-use-idioms-in-an-academic-essay

“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