Is “are you done for” similar to “are you ready for”?

Question

I heard this question: "Are you done for sushi?". I guess the guy who asked this question meant "Are you ready to eat sushi?".

Is it right or did I mishear the question?

Answer 1

I think you misheard the quote. Your friend probably asked:

Are you down for sushi?

Down for is used slangily, and is (perhaps ironically) roughly equivalent to up for.

So, he was basically asking, "Do you wanna have some sushi?"

Answer 2

I agree with rudra, 'are you done for' implies a note of doom or death, usually used in a jocular fashion. My mother was very found of this expression and nearly always used it in a jocular manner.

I could imagine someone jovially using it in the context of sushi to indicate the risk taken after eating sushi, especially if someone thinks of the blowfish.

Answer 3

Done for: doomed to death or extinction (though not literally, as shown in the following example)

How dare you do that! Now you are done for.

Done is also used colloquially as,

I am done. (I have finished.)

Are you done? (Have you finished? or Are you ready?)

Are you done for the party? (Are you ready for the party?)

Are you done for swimming? (Have you completed whatever task were doing and are ready for swimming?)

So, technically, "are you done for sushi?" is incorrect. Though, its use in informal conversations is alright.