Drop anchor
From Openwaterpedia
verb - To drop anchor is to stop immediately while swimming in an open body of water. Swimmers can drop anchor due to a jellyfish sting, a shark encounter, being ziplined or punched, a cramp, extreme fatigue, running into flotsam, or swallowing water.
Contents
Usage
He suddenly dropped anchor when he was punched during the race.
Synonym
stop, stop dead
Origin
Steven Munatones, circa 1986