Shamefaced continual thread hi-jacking on an internet forum, usually characterised by grandiose boasts made on a scale that would have made Pinocchio himself blush.
Rutbombing is ultimately defined by these claims being, often instantly and with embarrassing ease, refuted by skeptical fellow forum members
"You are learning to play the guitar? Well check-out this youtube clip of me playing Beethoven's concerto number 5"
"Oh rly? Well in that case, would you mind please explaining why the pianist featured in that clip is clearly of African origin and you are as white as a f**king sheet? Enough of the incessant Rutbombing, you lying little fink!"