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.
by Mr.Mysteriosity September 8, 2003
Get the black hat mug.
The black hat hackers are the ones that cause damage. White hat hackers do good with their hacking
by Don September 11, 2003
Get the black hat mug.
a hat which is black
oh thats a nice black hat
by Stace September 9, 2003
Get the black hat mug.
Dont try to hide your feelings white hackerz. Join the dark side
by Anonymous September 13, 2003
Get the black hat mug.
used in the SEO (Seach Engine Optimisation) industry as a way of describing players which in order to reach the goal of high rankings, participate in activities NOT liked by the Search Engines.
The only way to get high rankings in your industry is to employ a Black Hat SEO.
by Shak June 24, 2004
Get the black hat mug.
Word up G, I just got m new copy of Black Hat to run on my ghetto 386, yo'.
by Shrike September 4, 2003
Get the black hat mug.
A villian, a bad-guy, the guy who wears the black hat fighting the hero- not to be confused with that guy from RUN-DMC !
Man, Tyson was definitely the BLACK HAT in that fight !
by Rob Postuma September 15, 2003
Get the black hat mug.