comes from "
merc" (pronounced "murk") short for mercenary.
To be killed, murdered, or otherwise mercilessly and overwhelmingly defeated or put down. (well executed and without struggle, the way a pro mercenary would do it.)
Became
popular in early 2000's. Also spelled "merc", "
merk", and "merked."
"He murked that quarterback! No mercy. He
ain't getting up from that one."
"Did you
see that fight? He murked that boy with one hit!"
"
Don't even think of challenging him, man. He'll murk you before you can even reload. You got no chance."