Cowabunga! or Cowabunga Dude! used as a general cry of delight. Originated in Australian surfing sometime in the 1960s, cowabunga! is still shouted by surfers at the beginning of a good ride or wave. Today it is used more commonly due to the popularization of it by the animated television character Bart Simpson and the Teenage Mutant Ninja Turtle action heroes of the 1980's.