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1. Someone who is extremely rad. They may also have calves which are wider than their thighs.

2. Something which is extremely rad and often quite unique.
1. Dude! Look at Alana! She's such a radfish!

2. Person 1: Do you like my new top?
Person 2: WOAH! that's so radfish!
by Pippins Magee September 08, 2007
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