Top Definition
A Teenage boy who spends more time eating/siting on his behind and thinks hes god and cybers with Raynebird (also a man)
omg look at that no lifer he must be a seifiroth
by Joe September 16, 2004
Bitches about people posting videos on his wall even though he lives for them
Guy 1: Ew, Ew, EWWWWWWWW!!!

Guy 2: Wow stop being such a seifiroth. You never stop complaining
by Adler_69 April 19, 2011
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