Idiom of the day :- Hard-boiled

Usage, examples and definition of the Idiom :-

Never ask a hard-boiled person for help. He’d probably refuse you. People who arehard-boiled are uncooperative and unsympathetic. In the extreme, they have no feelings at all. ‘What’s wrong with Henrietta ? When she’s happy she’s so nice — but when she’s angry she’s really hard-boiled !’