loggerhead loggerhead /ˈlɑːgɝˌhɛd/

noun

1. Very large carnivorous sea turtle; wide-ranging in warm open seas  ( Caretta caretta , loggerhead , loggerhead turtle )
   very large carnivorous sea turtle; wide-ranging in warm open seas
   
   
2. A stupid person; these words are used to express a low opinion of someone's intelligence  ( blockhead , bonehead , dumbass , dunce , dunderhead , fuckhead , hammerhead , knucklehead , loggerhead , lunkhead , muttonhead , numskull , shithead )
   a stupid person; these words are used to express a low opinion of someone's intelligence
     John's absentmindedness earned him the nickname "lunkhead" among his friends.
   John's absentmindedness earned him the nickname "lunkhead" among his friends.