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1.
A Pokemon from the second set(152-251) and the evolved form of Sentret. It sucks more than most of the first 151, but less than those from 252 onwards.

It is a normal type, based off of a ferret, upon which its name is a pun.
Look! Sentret is evolving
*evolving music*
Sentret evolved into Furret!
by Ronin Catholic November 02, 2007
 
2.
A Ferret (feral animal) crossed with the recently popular electronic childrens pet/toy the 'Furby'.
"Jon is a Furret."
"Look i see a wild pack of rabbid Furrets."
by Anonymous February 14, 2003