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To describe something that is concidered to be "THE SHIT" or "DOPE".
That hat is manf young.
The way Joe picked up those bitches was manf, he slammed that one like no other.
by Dominick March 24, 2004
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2
A contraction. Created from the phrase, "Man, fuck....," where "fuck" is replaced with the "eff" sound when swearing is not appropriate. Pronounced "Maneff."
"This movie sucks. Manf this, I'm going home."

"Hey, Rhonda said you are stupid."
"Yea? Manf that bitch!"
by Dethbed666 January 19, 2012
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