Definition of unfastidious
: not fastidious : not extremely or excessively careful, selective, difficult to please, etc.
They are … notoriously unfastidious in their appearance, careless about deportment and singularly lacking in ambition.— Tony Jenkins
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Merriam-Webster unabridged
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Time Traveler for unfastidious
The first known use of unfastidious was in 1816
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