Top Definition
The new name for TV's SciFi Channel.
Dude, did you catch the rerun of Battlestar on Siffy last night?
by mhl2 July 18, 2009
2 more definitions
A siffy is a device made of solid material, generally flat, always toothed, and is used in hair care for straightening and cleaning hair or other fibers.

Also known as a comb.
Om my goodness, I lost my siffy. I must have dropped him in the bathroom.
by Emma_Doll January 28, 2008
having to do with White Castle, cheap, extremely skinny, many kids, oppositte of his father
a hick who does not like sharing, father eats in extreme amounts and has many quadrouple by pases per year, ALBINO
by Pete November 14, 2003

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