Often called "Semper sometimes". This is funny because Semper fidelis means "always faithful". Due to the nature of a reservist, they are the equivalent of part time workers in what is known as the Marine Corps. Therefore they are not "always faithful" which leads to them to only being faithful "sometimes". They are also called "weekend warriors" or "part timers" and are often the object of ridicule in jokes around real Marines
"John went the reservist route because he couldn't handle being a full time marine. Talk about Semper sometimes"
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the USCoast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.