Semper Fi

The motto of the United States Marine Corps. It means 'Always Faithful' in Latin. This rings very true because United States Marines are the most patriotic, as well as the bravest and selfless members of the United States Armed Forces. They are, in truth, always faithful.

Tommy: Hey, LJ, aren't you an ex-Marine?
LJ: No such thing as an ex-Marine. Once a Marine, always a Marine.
Tommy: Semper Fi, Marine.

by NevadaCharlieIndiaSierra November 07, 2010

Semper Fi

The genre of Science Fiction characterized by "futuristic" or "space" Marines fighting badly rendered CGI monsters, mostly giant bugs.

A: Whats on SyFy tonight?

B: Just more Semper Fi crap, Aliens, then Starship Troopers 7.

by Coxcomb11 January 05, 2010

Semper Fi

Chinese for "I have a limp dick."

I just boned my DI. He's hot. Now I have a Semper Fi

by Thebobs21 December 13, 2012

Semper Fi

Motto of the US Marines. It means "Kill them all and let God sort them out."

Just semper fi these niggers. We're late for the Klan meeting.

by MarinesGangRapedMe November 30, 2020

semper fi motherfucker!

Something from the movie Doom that Cooli says a lot.

Cooli: Semper Fi Motherfucker! *punches in face*

by warriors37 February 10, 2007

semper fi diddy

"I agree"

A: Shaq City is the place to rock.
B: Semper fi diddy.

by Anonymous September 19, 2003