Today's lesson is provided because I read it in a headline, and I hate to be bested by slang. I love slang! With that established, I want you to know that Old People are not likely to encounter today's word.
And that word is: murk. Webster's New Orld College Dictionary (Fourth Edition) defines murk as "darkness or grim," and notes that the word's usage is ARCHAIC.
Slangily, the word is a verb and means to beat someone so viciously that the victims dies, succumbing to his or her injuries. It is sometimes spelled merk.
Here's the headline that forced me to Google the word: "Protect Ya Neck: FBI Steps In As Crazed 'Fan' Threatens To Murk Ne-Yo And Record Exec Clive Davis!!"
The link below will take you to Bossip, so understand this isn't going to turn up in the New York Times any time soon. (Though it could end up on an episode of SVU hoping to gain a little street cred, yawn.)
Murk, Urban Dictionary
Protect Ya Neck: FBI Steps In As Crazed 'Fan' Threatens To Murk Ne-Yo And Record Exec Clive Davis!!, Bossip