jarhead 
noun US informal
A marine.A lot is made in many movies of the physical training and the technical training that they experience in boot camp but I really think boot camp is to turn you into a jarhead....
- I know what I meant, jarhead, I don't need the likes of you questioning my command of the language.
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.
- mushroom-like
- mushroom management
- mushroom powder
- mushroom ring
- mushroom spawn
- mushroom stone
- mushroom valve
- mushroom worker's lung
- mushroomy
- mushy
- mushy peas
- Musial, Stan
- music
- musica ficta
- musica figurata
- musical
- musical appreciation
- musical beds
- musical bow
- musical box
- musical bumps
- musical chairs
- musical clock
- musical comedy
- musical director