shark bait

noun3

1. •
   (humorous) One who has been, or is likely to be, attacked by a shark.
2. •
   (Australia, informal) A lone swimmer or surfer far from shore.
3. •
   (humorous) One who is in a precarious or vulnerable position.

   • Holden's heart was loud enough to deafen him. He couldn't go against a mage of the power. No one could, no one could ever survive. One word and he was shark-bait. — 2011