Search engine optimization (SEO) techniques that are frowned upon by search engines, and thus penalized by search engine algorithms.
Google hates people who use black hat seo techniques such as keyword stuffing.
by Dan-ji July 1, 2008
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Noun: The wife or girlfriend of a soldier in the army who wears the coveted Airborne/Air Assault/Pathfinder Black Hat and is never home.
There goes shelley she's a Black Hat Widow. Her man is never home.
by ASSLT BLACK HAT February 5, 2011
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The long jeri-curled very black cop in the movie bulletproof, see struck match for a further description.
U-cop-"Freeze!"
Jeri-curl-"You're under arrest!"
Keets-"You're breakin' my arm Miles Davis!"
Jeri-curl-"Fuckin' pussy!"
Keets-"What are you and the black in the hat doin' folliwing me around anyway?"
Jeri-curl-"We was just in the neighborhood."
Keets-"Anyone ever told you you look like a struck match?"
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When the last three girls that one has had sex with were black.
"Dude, the last three chicks i've banged were black!" well then thats the black chick hat-trick
by nickdanja1 April 30, 2010
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A bad trader that uses alot of money with bots and scripts to rob unsuspecting investors.
John: Hey did you see that fat ass Cryptosrus targetting people in the markets and stealing their money? How does he do it?

Anotnio: he must be a black hat trader using MEV scripts or something...
by Defi Domus March 19, 2023
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A female owning or proudly wearing her Black Nike Hat tends to posses elite knob gobbling abilities far beyond those without such a cap.
“She look like the type a girl to wear a black Nike hat.”
“You know that black Nike hat a badge of honor for that exceptional neck.”
by Yung Cabbage April 23, 2022
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