What does the idiom “cry wolf” mean?
cry wolf [verb]
To issue a false alarm, to ask for help when none is needed
‘She says someone is following her, but sometimes she’ll cry wolf to get attention.”
From a fable, “The Boy Who Cried Wolf,” by the ancient Greek writer Aesop, about a boy who tells villagers that a wolf is going to attack a flock of sheep. He knows there is no wolf, but then when a wolf comes and he tries to warn the villagers again, no one believes him.