get your fingers burned
get (one's) fingers burned
To suffer an unpleasant or ruinous consequence (especially the loss of money) for some action, often such that one becomes unwilling or uneager to do it again. During the boom times, countless would-be investors put everything they owned in shady investment deals, and most of them ended up getting their fingers badly burned.
get your fingers burnedor
burn your fingers
COMMON If you get your fingers burned or burn your fingers when you try do something, it goes wrong, and there are very unpleasant consequences for you. Unfortunately many people got their fingers burned when the Web phenomenon burst onto the scene. Foreign investors have a long history of burning their fingers when they try their hand at making Hollywood movies.