bet the farm
Verb
Meaning
(idiomatic) To be absolutely certain, to have no doubts.
I'd be surprised if those two are still dating come Christmas, but I'm not betting the farm on a breakup just yet.
To make a substantial wager or risk.
Source: en.wiktionary.orgSynonyms
go for broke
pull out all the stops
bet the ranch
bet one's boots
bet the house
bet one's bottom dollar
Examples
But I don't bet the farm on any of those possibilities, either. I'm also preparing, intelligently, to walk away from this, and walk away from it happy to have had the experience.
Television studios bet the farm on reality shows, where they didn't need any actors and movie studios had no plans for any quality movies that required the presence of me.