Semper Fi, adopted in 1883, is the U.S. Marine Corps motto. It's short for Semper Fidelis, which is latin for "Always Faithful." To many Marines, Semper Fi, is not just a phrase but a way of life-the commitment that they all share to their community, to their Corps, and to eachother. It's why there are no ex-Marines, only former Marines.
Cesar: I love the Marine Corps so much, that I got a tattoo of their emblem.
Josh: Semper Fi!
The name used to represent all "bad" sailors in the U.S. Navy, especially when you don't want to give away their name or don't remember it.
And then I walked in and found Seaman Smedlock performing a human vacuum on another guy smoking marijuana in the Radar Department.