put your shirt on something
put (one's) shirt on (something)
1. To bet or risk everything one has on something. Tech companies seem to be putting their shirts on virtual reality being the future of the industry. Anyone with a gambling addiction knows the feeling of putting your shirt on a hand of cards, feeling sure it will pay off big time, only to lose everything.
2. By extension, to be absolutely certain that something will happen. I would hope that the industry is moving towards a more customer-friendly position, but I wouldn't put my shirt on it.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
put your shirt on somethingmainly BRITISH
If you put your shirt on something, you bet or risk a large amount of money on it, because you are certain that it will win or succeed. I was just thinking you might put your shirt on Golden Boy. It's bound to be a winner, isn't it? Note: You can also say that you lose your shirt, meaning you lose all your money on a bad investment or bet. His father warned him that he knew nothing about shipping and could easily lose his shirt. If you play cards with the big boys, you can lose your shirt.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
put your ˈshirt on something(British English, informal) bet a lot or all of your money in a horse race, etc.; invest all your money in something: I’ve put my shirt on Diamond Lady in the 10.15. ♢ He put his shirt on the future of the company.
Farlex Partner Idioms Dictionary © Farlex 2017