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1.
Female equivalent of beating up. Not so violent and involves a lot of pushing and the occasional pinch. From the series "Confessions of Georgia Nicholson]".
Jes was duffing up on Ellen. Jes was winning.
af ʎppǝɹɟ ǝןqısıʌuı 13. april 2009
 
2.
duffing up is the female equivelant of beating up, or kicking ass. It's not so violent in a sense, and to a certain degree. It usually involves excessive screaming, clawing, pushing, and shit-talking.
ali is effing duffing up mandy, alis guna win, mandys so screwed.
af Ali Lansing 15. juli 2006
 
3.
chicks fighting by pushing and a lil' pinching goin on
af bIg Hairee Schlong 26. september 2003