Spanish for iron but in Mexico it has slang meaning either as "Fierro Pariente" which literally means iron relative and is when saying to a close family or freind. Also mean Ok, like for example.
¿Puedes trae las chelas alla en el rancho?
"Fierro"
Can you bring the beer from the ranch?
Yea
by CompaCruz November 15, 2019
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Fierro is actually Italian for strong fire. And its an Italian mafia family from Sicily, not Mexico.
That Fierro is a ginnie
by Gambini May 16, 2008
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Fierro is now a verb (derived from the MCGA book character Alex Fierro) for:

1. to do something badass
2. to roast a (queerphobic) cishet
3. to decapitate someone

thank you, and have a nice day.
For Definition 1: Most of Gen Z tend to take pride in fierroing (I had to be creative here, okay?)

For Definition 2: "Did you see them fierro? That Karen was completely WRECKED, don't you think?" He told xem. (yes, neopronouns exist)

For Definition 3: Fierroing someone is a crime in all places, with the exception of Valhalla.
by Z—Yeet September 10, 2021
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1. The slang term for a penis longer than 8 1/2 inches.
2. A penis which has a unique maneuverability, almost a mind of its own.
3. A snake disguised as a penis.
Samir: Jeez, look at his Fierro!
James: I know, i can see it through his jeans!

Tony: Did you see how i used my Fierro?
Kevin: Yeah, it was a very convincing puppet!
by Chris Gutes August 9, 2012
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Strong Mexican mafia family, construction company, Yard work, and nucular powerplant owner
by Lindz G January 8, 2008
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A male person who performs the act of ass eating.
Person 1: Look its andrew.
Person 2: I don't like him! He's a fierro
Person 1: omg really that's disgusting.
by mawuto April 28, 2014
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San Fierro is the 2nd city you visit in the state of San AndreasFierro (Grand Theft Auto : San Andreas) and is based off of the real life city of San Francisco. Steep hills, a blind Chinese triad leader, superficial artistic rich middle age women living off alimony, and don't forget the Golden Gate Bridge.
"What's you're favorite city in GTA : SA? Mines San Fierro.
by owenmayo March 20, 2016
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