tough cookie

tough cookie---someone who is unemotional and are not easily hurt by what people say or do.
tough/smart cookie informal
someone who is clever and successful, and knows how to get what they want
Jigsaw 曾經說過Sally-Ann was one tough cookie.

Have you gone bonkers?--Are you crazy?

He had all the sympathy of a tarantula. ---(spider)

You use hard-boiled to describe someone who is tough and does not show much emotion.

Then it dawned on me.
if a fact dawns on you, you realize it for the first time


that's the way the cookie crumbles----said when something bad has happened and you must accept things the way they are, even though you do not want to