Pronounced: Gi-Noot. Gnoot is a slang term for 'Good Night', Gnoot is most commonly used by gamers who shortened the original words for ease of use when leaving group calls.
GNoobenFlooben: An experienced person who disguises themselves as a big noob for fun, sometimes even disguised as a person so noobish they pose a threat to society.
Look at bob, he is such a gnoobenflooben!
Ah look at Tim portraying himself as a gnoobenflooben for his own benefit, dreadful!
*Man 1 hands Man 2 a piece of paper*
Man 2: Huh, I never knew that " Neil Armstrong "spelled backwards was " Gnorts, Mr. Alien"
Man 1: Did we send him to the moon, or did we send him BACK to the moon?
Man 2: You're a fucking dumb-ass, Steve.