shellback

(s̸helbak′)

noun

  1. an old, experienced sailor
  2. anyone who has crossed the equator by ship

Origin: shell + back, in allusion to the shell of the sea turtle

See shellback in American Heritage Dictionary 4

noun
  1. A sailor who has crossed the equator.
  2. A veteran sailor.

Origin:

Origin: From the toughness of such a sailor

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