Top Definition
another name for FANNY MINGE OR FANJITA
'do u have an itchy flu flu??'
by Sam albert is so fine Cook July 07, 2003
Flu-Flu is another term for vagina. Often used when dealing with a baby when changing a diaper.
"Cover that Flu-Flu, no wants to see a baby bug."

by NOS BOD January 27, 2009
A term used when men act like little 5 year old girls
Dude shut up you sound like a flu-flu
by Beetlejuice3 January 10, 2016
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