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 5, 2010
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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
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Something said when something really exciting or cool happens.
Hey Slap Nuts! I just robbed a prostitute!

That's Semper Fidelis
by Tinkle Toys April 20, 2010
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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
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semper fi, do or die... a phrase so stupid that it can only be barked after brain washing.
Do as you are told, even if it kills you.
by ChinNuts? May 25, 2005
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............ bitch

used when you get tired of answering a question
"semper fi bitch"

use it!
by anonymous February 28, 2005
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Latin, translation: "Thus always to tyrants", purportedly (but unlikely) uttered by Brutus at the assassination of Julius Caesar. The phrase is meant to signify that tyrants will always be overthrown and removed from power.

The other person who defined this just got it flat out wrong. Didn't think people could be that stupid.
by AtheismoTheGreat June 27, 2015
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