Get On My Level Because You're Not On My Level.
You suck at this game. I'm better than you. Get better.
Hey noob, you suck, GOML because you're NOML
Another thing this can mean is "GET ON MAJOR LOSER". Can be used when asking someone to get on a video game.
"Hey man I don't think imma get on tonight "
"No way. GOML!"