loggerhead Meaning, Definition & Usage

  1. noun a stupid person; these words are used to express a low opinion of someone's intelligence
    bonehead; shithead; hammerhead; dunce; knucklehead; dunderhead; blockhead; fuckhead; dumbass; lunkhead; numskull; muttonhead.
  2. noun very large carnivorous sea turtle; wide-ranging in warm open seas
    loggerhead turtle; Caretta caretta.

WordNet

Log"ger*head` noun
Etymology
Log + head.
Definitions
  1. A blockhead; a dunce; a numskull. Shak. Milton.
  2. A spherical mass of iron, with a long handle, used to heat tar.
  3. (Naut.) An upright piece of round timber, in a whaleboat, over which a turn of the line is taken when it is running out too fast. Ham. Nav. Encyc.
  4. (Zoöl.) A very large marine turtle (Thalassochelys caretta, ∨ caouana), common in the warmer parts of the Atlantic Ocean, from Brazil to Cape Cod; -- called also logger-headed turtle.
  5. (Zoöl.) An American shrike (Lanius Ludovicianus), similar to the butcher bird, but smaller. See Shrike. L' Estrange.

Webster 1913