People who pay for advantages in-game are often called "premiums" or "premium players".
Noobs are people who cant play the computer game to any sort of skill level.
Premium Noobs are people who pay for unfair advantages in-game, as without them paying for the advantages, they are just noobs who can't play the game properly.
Guy1: "Hey, Guy2 has a weapon that's damage statistics have been boosted"
Guy2: "I had to pay for this you know"
Guy1: "PREMIUM NOOB!"