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1. In jeopardy; doomed. A set phrase. If the boss finds out that I was the one who messed up that report, I'm done for! Now that mom knows about it, our scheme is done for.
2. About to break or stop working, as of a machine. The blender stopped working again this morning—I really think it's done for this time.
1. Exhausted, worn out, as in This old computer is just about done for. [Colloquial; c. 1800] Also see done in.
2. Doomed to death or destruction, as in Before he went to the hospital it seemed as if he was done for. [Colloquial; mid-1800s]
done forin a situation so bad that it is impossible to get out of it. informal
1993 Catholic Herald Don't you realise that without that contract we're done for?
mod. lost; dead; doomed. I’m sorry, this whole scheme is done for.
Doomed to death or destruction.