f00b
A f00b is a brainless newbie who thinks they're cool just because they know the word 'n00b'.
My cousin is a f00b. He still uses 'l0l' in every sentence.
This f00b tried to join our Discord server and said 'h3llo' instead of 'hello'.
That f00b posted 'I’m a f00b' in the comments of a meme nobody cares about.