a Frankenstein's monster

a Frankenstein's monster

something that cannot be controlled and that attacks or destroys the person who invented it
Usage notes: This phrase comes from the book Frankenstein by Mary Shelley.
Giving extra powers to the army turned it into a Frankenstein's monster that is now threatening to overthrow the ruling party.
See also: monster
References in periodicals archive ?
You can be a Frankenstein's monster or a vampire," he says.
Unlike his many tough-guy roles, de Niro seemed a reasonably happy drunk and not a Raging Bull or even a Frankenstein's monster.