l4t0r
A rude way to say goodbye. It's like telling someone to go to hell but you're still being a bit of a jerk about it.
L4t0r, I'm leaving. You're still here. You're a total loser.
L4t0r, I'm outta here. You're still in here. You're a mess.
L4t0r, I'm going. You're staying. You're a dumbass.