out and outer

/ˌaʊtəndˈaʊtər/
noun
  1. A person who is extreme or uncompromising in their behavior, opinions, or actions; a thoroughgoing or complete person in a particular quality.
    • My grandfather was an out-and-outer when it came to gardening—he spent every spare moment in the yard.
    • The coach is an out-and-outer about discipline; no player is allowed to be even a minute late.
    • She's an out-and-outer in her dedication to charity work, often working late into the night.
Antonyms
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