How idiots spell "noob". Said idiots either can't spell or forget that a "nub" is what is left after an amputation. This error can be attributed to the fact that most people under the age of 20 seem to be incapable of spelling the simplest of words correctly - probably due to overuse of auto-correct/spell-check doing it for them.
Person 1 - "l2p u dum nub"
Person 2 (educated) - "Learn to spell, asshole."