Top Definition
A Macintosh user who is still using Mac OS X "Panther", in spite of their being two newer versions (Tiger, Leopard)
Pal: Hey, you load up Leopard on your machine yet?

Me: Nope...I'm Mr. Three Cats Back!
by BWB October 31, 2007
A Macintosh user who is still using Mac OS X "Panther", in spite of there now being two newer versions (Tiger, Leopard)
Pal: Hey, you load up Leopard on your machine yet?

Me: Nope...you can call me Mr. Three Cats Back!
by BWB November 28, 2007
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