adjective
1Not characterized by excessive or unnecessary effort; not elaborate, uncomplicated.
2Of a person, or his or her behaviour, etc. Not agitated or worried; calm, unruffled.
3British, Irish, Australian, New Zealand Not feeling or showing interest or concern (about); indifferent, unbothered. Chiefly in predicative use.
Origin
Late 19th century; earliest use found in Land of Sunshine. From un- + fussed.
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