latin word meaning "always faithful" also the moto of USMC (the greatest fighting force ever constructed)
once a mairne, always a marine. semper fidelis. always faithful.
by !USMC2010 March 25, 2010
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Semper Fidelis is a march written by John Philip Sousa in 1888. Sousa was known as the American March King, a member of the United States Marine Corp Band, he wrote this march which became the official march for the Marine Corp. He also wrote Star and Stripes Forever the national march of the United States of America.
Semper Fi Semper Fidelis
by bandmember July 4, 2013
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1. adj. genuine.

2. adj. (slang) complete.
1. He's a bona fide French chef.

2. You're a bona fide idiot.
by kadatz May 19, 2010
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Percepti Fidelis is Latin for "Busy Creating The Perception." Well known in the United States of America as the motto of underpaid tech workers who telecommute or work flexible schedules (flex schedules), this phrase, often shortened to Percepti Fi in telecommute contexts, has served as a slogan for many workers and entities, in many countries, dating at least as far back as the 20th century.
Upper management had a perception that Ted's telecommuting was unproductive and that he was never at his desk, so he got busy creating a "new perception" -- Percepti Fidelis!

Did you know tasks can be completed even if C-levels can't physically see you sitting at your desk? -- Percepti Fidelis!
by Gern Blanceton September 24, 2009
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Boner fide is a way to confirm that a woman is truly hot an/or sexy based on scientific evidence. This is done by looking, touching and feeling of said woman and then waiting to see if a boner is produced. If a boner is present after the process then the woman is deemed boner fide hot.
I got drunk with Cindy last night night and to make a long story short I was able to verify that she is a boner fide vixen.
by saharadryhumor January 18, 2015
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Jamaican dialect

Refers to something or someone who is genuine or sincere.

Origin

From the Latin bonā fidē, the ablative case of bona fidēs.
She a my bona fide.

That's my bona fide friend right there.
by Tropical Rythms December 9, 2021
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maria fidelis Also known as MF standing for Mother Fucker is one of the schools most drama and fights you can spot them wearing an ugly blue uniform and sparking ppl in the jaw on the streets
maria fidelis So full of drama

The kids from maria fidelis are so loud
by Dw_12234 April 17, 2019
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