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the fucking sexiest last name alive or also known as a a girl who has a very big ass
Dam that Claire girl has a nice fishburn.
by bubblebee February 22, 2005
(aka "fishbelly burn") A sunburn on only one side of a body part (where the resulting difference in coloration is so distinct, that it resembles the difference in color between a fish's top and bottom).
Man, look at the difference between the top and bottom of your arm! What a fishburn?!
by AwesomeTheCat May 30, 2011