burn your fingers

burn (one's) fingers

To suffer an unpleasant or ruinous consequence (especially the loss of money) for some action, often such that one becomes unwilling or reluctant to do it again. During the boom times, countless would-be investors put everything they owned into shady investment deals, and most of them ended up burning their fingers badly.
See also: burn, finger
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

burn your fingers (or get your fingers burned/burnt)

suffer unpleasant consequences as a result of your actions.
1998 Times An American buyer remains a possibility, although it is not entirely clear why any would want to risk getting their fingers burnt twice.
See also: burn, finger
Farlex Partner Idioms Dictionary © Farlex 2017
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References in classic literature ?
'Cos you'll only burn your fingers if you don't, that's why.
You may burn your fingers a little, of course; but then it's a hundred thousand roubles, remember--it won't take you long to lay hold of it and snatch it out.
A hot pool of melted wax can burn your fingers if you dive in for a wick before it's cooled and solidified.
Beware of holding the pipe from the bowl especially on this model of pipe since it gets hot and can burn your fingers.
Try the Wicked Weaver bubble barrel attachment (PS11.99) for a head full of different waves - but be sure to wear the gloves as it's very easy to burn your fingers.
Cox and Cox (www.coxandcox.co.uk) has an extending toasting fork that ensures that you don't burn your fingers in the process.
The next time you are hungry and crave a bite into a cheesy pizza, there will be no need to look for cash at home, run to the nearest ATM or burn your fingers at the stove.
Washington, July 27 (ANI): The first time you burn your fingers by touching a hot stove you get the lesson to avoid doing it in the future.
So don't burn your fingers like you have burnt your letters outside the town hall, take whatever is offered, you will not regret it.
Then unwrap the foil, taking care not to burn your fingers.
6 For serving, carefully place the cooked bananas back into the "petal" skins, taking care not to burn your fingers. Serve immediately.
Never use your finger as a dipstick unless you want hot grease to burn your fingers.
If you buy today to make a big killing in two years' time, you are quite likely to burn your fingers."
But closer inspection reveals that this limited SE variant is a red hot little number at a price that won't burn your fingers.