The act of vultching describes somebody trying to flirt with or feel up someone else without really hiding what they are trying to do.Someone who vultches is often trying to get with a vulnerable or lonely girl who they see as easy prey.
James: "Kaaaassssers!!! I love you Kassseeerrrss!!!!
*Puts his arm around Karlie*
Karlie: "Stop vultching on me James!"
Michael:"Blud you were bare vultching on Karlie today."
James: "How was I vultching!?"
Michael: "You were touching her ass!"
Lee: "He's right, we all saw it mate."
James: "Fuck's sake..."