-If you were hanging out with a friend and left to hang with "cooler" kids, you were a flat leaver
-If person A hangs out with person B & C, and then person A leaves to hang out with person D & E, then person A is a Flat Leaver...
Person A: ::playing video games with person B & C::
::Enter person D & E::
Person D & E: Hello person A, come hang out with us
::Person A leaves person B & C to hang out with person D & E::
Person B & C: You're a Flat Leaver person A...
meaning if an old friend or enemy is not around for you to see, then that just means that he is out of your mind, meaning you are not thinking about him/her/them...they are living their own life and you are living yours...
Person1: What ever happened to person3???
Person2: Who cares, fuck person3, out of sight out of mind!!!