1. merk - to kill someone, from the word mercenary, to kill for money, getting merked.
2. merk - to engage in unrestrained sexual intercourse, until the recepient can not walk!
The term merk is an abbreviated slang expression for a Mercenary, one who is a civilian for hire, that becomes involved in military black ops (Operations), so when you Merk someone, you do a number on them in a , Black Op's covert manner and normally executed with extreme prejudice, and that means they can normally kiss their butt goodbye.
'ref: Stingray uk answers yahoo.com'
1. I'm gonna Merk that dude for stealing from my house
2. I won't waste no time i'll make it worth it.
One hundred percent i'll make it perfect.
You got a body to die for lemme merk
'Song: Dizzee Rascal feat. Calvin Harris - Dance with me'