black hat 

1- A Hacker (Or rather cracker, but that's a different discussion) who uses his abilities for malicious purposes.

2- Anything relating to malicious use of the internet.

1- as a hacker, I would have to say he's definately a black hat hacker.

2- since the software's ony use was generating registration keys for legitamite software, it was considered balck hat software.

black hat by Mr.Mysteriosity September 7, 2003

Black Hat 

1- A type of Hacker that uses his/her skills for malicious purposes or own amusement/beneficement

2- A synonym for Villain, The Bad Guy, the one that opposes to the good guy and all the pathetic heroes of the world

3- The protagonist of Villainous

-1-
-Did you see in the news? a Black Hat Hacker just hacked the fucking NASA!
-WTF DUDE?! HOW?!

-2-
-In the Marvel Thanos is the biggest Black Hat in it
-I don't think so, he can be all powerful he wants, but NOBODY beats Ultron

-3-
Black Hat: Greeting you poor try of a Villain, Black Hat here! to turn your most wicked thoughts in REALITY!

Black Hat by W.D Shadow Marco C. Krueger February 11, 2018

Black Hat 

A hacker who uses his skills for unethical destruction.

"Those damn Black Hats hacked my website!"

"Josh is the biggest Black Hat going around"

Black Hat by Flash Lover February 28, 2010

black hat 

evil

The black hat hackers are the ones that cause damage. White hat hackers do good with their hacking

black hat by Don September 11, 2003

black hat 

a hat which is black

oh thats a nice black hat

black hat by Stace September 9, 2003

black hat 

the most honest hackers.

Dont try to hide your feelings white hackerz. Join the dark side

black hat by Anonymous September 13, 2003

Black Hat 

An ultra-Orthodox or Haredi Jew, known for always having a big beard and a big black hat.

Those black hat Jews are crazy, they'll beat your ass if you disrespect in their neighborhood.

Black Hat by Snake Fish April 9, 2009