The Collaborative International Dictionary
Done brown
Done \Done\, p. p. from Do, and formerly the infinitive.
Performed; executed; finished.
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It is done or agreed; let it be a match or bargain; -- used elliptically. 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; killed. [Colloq.] Done up.
Wrapped up.
Worn out; exhausted. [Colloq.]
Wiktionary
done brown
a. (context dated English) Thoroughly deceived, cheated, or fooled.