The Collaborative International Dictionary of English v.0.48:
p. p. from Do, and formerly the infinitive.
1. Performed; executed; finished.
2. It is done or agreed; let it be a match or bargain; --
Done brown, a phrase in cookery; applied figuratively to
one who has been thoroughly deceived, cheated, or fooled.
Done for, tired out; used up; collapsed; destroyed; dead;
(a) Wrapped up.
(b) Worn out; exhausted. [Colloq.]