jarheadEnglishOxford Dictionary of Englishjarhead /ˈdʒɑːˌhɛd / ▸ noun US English informal a marine. – ORIGIN early 20th century (originally US dialect, in the sense ‘mule’): from jar1 + head. The word originally referred to members of the US army, on account of the mule mascot of the Army football teams.
EnglishOxford Dictionary of English
