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When a man finds the perfect girl, or who he believes to be the perfect girl, and makes little attempts to befriend her. Although in the long run, he usually just hangs around her, to a point of near stalking until she disappears, then complains about how he let her go away.

People usually experience the Raptor syndrome multiple times in life, as the 'hunt' a certain type of girl.
Guy 1- "Man, I met this girl who is just like Girl 1, I wanna talk to her soo bad man, she's perfect"

Guy 2- "You gotta let go this Raptor Syndrome and just make a move man, you're pathetic"
by SaintDredd September 09, 2009