man of action

Noun

man of action (plural men of action)

1. (set phrase) One who acts or reacts boldly, without hesitation, and often without forethought, especially in situations which are adventurous or dangerous.
   • "I have heard that the Scots are good men of war," said Hordle John. "For axemen and for spearmen I have not seen their match," the archer answered. […] "And the French?" asked Alleyne, to whom the archer's light gossip had all the relish that the words of the man of action have for the recluse.1891, Arthur Conan Doyle, chapter 8, in The White Company (fiction)
   • The third was a man of action, a combatant, a bold and impatient executive, breathing fire and steel.1909, O. Henry, Roads of Destiny

   Synonyms:

   doer