Person 1) What'you doing in there man?
Person 2) Nothing...
Person 1) (As he walks in on his friend on a computer in another room) Man, you're hawkin'.
Person 2) What? I'm on Facebook...
Person 1) Exactly, you're Hawkin' on that girl. Everytime I see you on Facebook, you're on that girls page, Hawkin'.
Hawkin' or Hawk. Derived from the bird, also known as a Hawk. When you "Hawk" someone, you are constantly showing interest, trying to talk with them/spit game. Basically, "watching them like a, Hawk".