Yuffie Kisaragi(Final Fantasy VII-Testuya Nomura), to "Yuffie"; to steal something someone would rather not have stolen.
by Agatsuma Ritsuka September 24, 2009
Get the Yuffiedmug. 
Ok, this is probably the most accurate definition. Not to be confused with "yuppy", which is Young Urban Professional, a yuffy is a hippy that has betrayed their hippy origins. They are old people who now never smile, work for the establishment, and worship Satan by sacrificing your baby(JK). They are the worst people I can imagine.
by _prophint_ March 28, 2009
Get the Yuffymug.