take the plunge
Meaning: If you take the plunge, you decide to do something you really want to do even though it's risky and possibly dangerous.
- I'd always wanted to be a writer, so when I was thirty I took the plunge. I quit my nine-to-five job and worked full-time on my novel instead.
- Bill decided to take the plunge and put all his money into the stock market - just before the market crashed. Now he wishes he'd left it in the bank.
Monique has decided to take the plunge and