Top Definition
Halk Octopus, half Hipopotomus, all Rock!!
this reclusive beast is said to be able to play the triple guitar owing to its many tentacles and protrusions. Many have lost not only thier lives but also thier very souls to this fearsome denizen of the shadows.
"I can't tell if I like that Rocktopotomus' hat or not."

"Man, I'd give my toenail clippins to be a Rocktopotomus!!"
by Pruu December 12, 2005
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