WordNet (r) 3.0 (2006):

surfing
    n 1: the sport of riding a surfboard toward the shore on the
         crest of a wave [syn: surfing, surfboarding,
         surfriding]

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "surfing":
   Australian crawl, aquaplaning, aquatics, backstroke, balneation,
   bathe, bathing, breaststroke, butterfly, crawl, diving, dog paddle,
   fin, fishtail, flapper, flipper, floating, natation, sidestroke,
   surfboarding, swim, swimming, treading water, wading,
   waterskiing



The Free On-line Dictionary of Computing (30 December 2018):

surfing

   ("Internet surfing") Used by analogy to describe the ease with
   which an expert user can use the waves of information flowing
   around the Internet to get where he wants.  The term became
   popular in the early 1990s as access to the Internet became more
   widespread and tools such as web browsers made its use simpler
   and more pleasant.

   (1995-01-05)