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Acronym for first lady I would fuck. Also, it can mean it's literal meaning that you would fuck the first lady you would see in a room.
Bob: Michelle Obama is a fliwf!
John: Amen

Bob: I hope Jane is the fliwf.
Jane: Eww! Gross! I am right here!
Bob: Sorry.
by jjjfhvshugsduhgufsdhugfus December 22, 2010
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