Red-faced and coarse-looking; disheveled or unkempt; having a bloated, ruddy appearance.
From 'blowse' (to make untidy) or from 'blowze,' an older word meaning ruddy or coarse. Common in British English from the 1700s onward.
A 'blowsed' face was traditionally what you'd look like after a long night of carousing—red, puffy, and messy, which is exactly why it was such a cutting insult!
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