More stuffy, stale, or musty in atmosphere or smell; more unkempt or slovenly in appearance.
Comparative form of frousy, which may derive from Dutch or Old English roots meaning stuffy or dank; related to the idea of stale air and poor ventilation.
Before modern ventilation, buildings got progressively 'frousier' throughout the day as air got recycled—it's why wealthy people opened windows and poor people lived in frousier conditions.
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