sponging
n.— «Bodysurfing, or “sponging” as it’s called by regular boogie boarders, is a lot easier than surfing and a great way to get wet without going too far out to sea (the best waves are usually near the beach).» —“Tech On The Beach” 50connect.co.uk (United Kingdom) June 24, 2007. (source: Double-Tongued Dictionary)