1 definition by Jwoflava
A catfish is someone who assumes a false identity on the Internet using various platforms including but not limited to Facebook, Twitter, and Instagram. A catfish is often undesirable in comparison to thier profile, as an actual catfish would be to a premium "catch" fish like Alaskan salmon.
I met this guy on match.com who was a total catfish. His pic was cute but he obviously thinks he is a time traveler cause he looked like Matlock!
by Jwoflava August 12, 2013