unkown

admit it, we all misspelled unknown wrong, right?

haxor: i am an unkown hacker and i will hack you for calling me a noob
grammar nazi: You forgot to capitalize the I's, forgot the period and lastly, you couldn't spell unknown right, you fucking idiot.

PG

PG stands for Password Guess.

haxor: Yus, I PGed a really good account in Steam, it has loads of games in it!
guy who has the account: You know I can just change the password?