sandbank left
n.— «In the argot of surfers, the “sandbank left” in Mundaka was a magical, adrenalin-pumping wave that produced “intense barrels” as it ran for 400 metres of surfing heaven. It broke to form a classic tube that allowed surfers to enter what they call the “green room,” or the rolled-up inside of a wave.» —“Early bath for surfers as world-class wave proves a washout” by Giles Tremlett in Madrid Guardian (U.K.) July 20, 2005. (source: Double-Tongued Dictionary)