The phrase "black hat" typically refers to someone who engages in unethical or illegal activities, especially in the field of technology or computer hacking.
Sentences with «black hat»
For websites that engage in black hat techniques, it's only a matter of time before a penalty will hit. (postali.com)
Discuss ways to improve your sites ways using Black Hat SEO tactics! (blog.feedspot.com)
My personal favorite is something I might wear — the pink knit coat with black hat, scarf and bag. (40plusstyle.com)