Panther
A male who seeks out younger females who are 2-whatever years younger then him. For example Hugh Hefner.
Ex1. Dang he be a panther with that chick!
Ex2.
Guy 1: Dude come on you cant go out with her.
Guy 2: Why not?
Guy 1: She's like five years younger then you.
Guy 2: So...
Guy 1: That makes you a panther, and no one likes a panther.
Guy 2: True that true that.