In a way that is untidy, messy, or slovenly in appearance; in a blousy manner.
From 'blousy' (also spelled 'blowsy'), which may derive from Middle English 'blowze,' possibly related to ruddy or flushed complexions. The adverbial form adds '-ily' to indicate manner.
The word 'blousy' originally described the red-faced, disheveled appearance of working-class women in 17th-century England—what was once a social judgment about poverty and class has become simply a descriptor for untidiness in modern English.
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