burn your fingers
US /bɜrn jʊər ˈfɪŋɡərz/
UK /bɜrn jʊər ˈfɪŋɡərz/

1.
痛い目を見る, 損をする
to suffer unpleasant results of an action, especially by losing money
:
•
He burned his fingers badly in that risky investment.
彼はその危険な投資でひどく痛い目を見た。
•
After trying to fix the car himself, he burned his fingers and had to pay even more for professional repairs.
自分で車を修理しようとした後、彼は痛い目を見て、専門家による修理にさらに多くのお金を払わなければならなかった。