The jarheads got there first and let them know what was what.Do you want to spend a few years as a gravel-pounder or a jarhead? You get free clothes with both jobs.
jarhead
noun
1
a US Marine. Originally an army mule, then a member of the US Army, especially a member of the football team (1931) US, 1943.
2
a habitual user of crack cocaine US, 1993
jarhead
n. a U.S. Marine. (Attributed to the shape of a cap and to the haircut.) Do you want to spend a few years as a gravel-pounder or a jarhead? You get free clothes with both jobs.