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The female equivalent to shirt-cocking, where a woman wears only a sweater, often post-coitus, but nothing else. Unlike "shirt-muffing" where the female subject may intend to dress provocatively in order arouse men, a sweater-muffing individual hopes no one will see her and uses only a sweater usually because it is easier than putting on normal clothes or because she is cold.

Sweater-muffing is common when performing quick rudimentary tasks after intercourse such as running to the kitchen to get some juice or checking one's email.
Charlie: I just saw our neighbour sweater-muffing it in the kitchen.
Jon: Wow at 3pm?
Charlie: Yeah, she was getting some juice.
Jon: You need a job dude.
by cabern October 31, 2011
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