To be exhausted and in need of rest. I'm done in after exams each year—I feel like I need to sleep for a few days afterward.Can you pick up the kids from soccer practice? I'm totally done in.
(British, American & Australian informal) alsobe all done in (American)
to be too tired to do any more She was done in by the time she had cleared up after the party.I'm all done in - sorry, but I can't walk any further without a rest.