derring-do(redirected from derring-dos)
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Daring or reckless action.
[Misinterpretation of earlier derrynge do, daring to do, misprint of Late Middle English dorryng do, from Middle English durring don : durring, present participle of durren, to dare (from Old English durran; see dare) + don, to do; see do1.]
archaic or literary a daring spirit or deed; boldness or bold action
[C16: from Middle English durring don daring to do, from durren to dare + don to do]
daring deeds; heroic daring.