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1.
The flakes which appear on a man's penis after unprotected sex as a result of dried vaginal fluids
Girl: OMG do you have an STD???
Guy: No those are manflakes. I lied when I said I was putting a condom on
by HotBabyCarlos February 07, 2010
 
2.
A macho word for dandruff.
"Ew, I would never date him. He has major manflakes."
by Golden Twilight January 01, 2010