Goodbye Loser

Goodbye Loser is used when a Pro beats a noob, Some common synonyms are Haha, That's what you get for messing with a pro.

Pro: You are the dumbest noob on earth, Goodbye Loser!
Noob: waaaaaaaaaaaa

Omg

Omg is when you say an expression as a fool in the world.

Omg! This guy peed on his pants!