Bet the farm/ranch on something
Definition 1 of 1
Pro Tip 1/3Metaphorical Use
The phrase isn't about actual farms. It means risking a lot on one chance. 
She bet the farm on that stock, now she's anxious.
Pro Tip 2/3High Stakes
Using the phrase implies the outcome is very important to the person. 
He bet the ranch on winning the poker tournament.
Pro Tip 3/3Figurative Risk
Even if there's no physical farm, it expresses taking a significant risk. 
I'd bet the farm you'll love this movie.