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2.
This is what I was told back in High School. It's when 2 men have anal sex and then one man cums up the other guy's ass. Then that guy who came sucks the cum back out the ass with a straw. Hmm.
Ted and Fred love to slurk each other.
by Ted April 21, 2003
 
1.
Lurking while not doing anything in particular, or of use. Particularly applies to late nights, when thought is difficult.
Ted: Hey Mike, what're you doing up at 3 AM?
Mike: Slurking.
Ted: Oh. So you're like ... browsing 4chan?
Mike: Nah. Just slurking.
by Naz M. April 17, 2010