Top Definition
A poorly-understood species of squid even more massive and fearsome than the giant squid. Its tentacles are covered with swiveling hooks in addition to suckers, making it one of the ocean's most formidable predators. It is the only cephalopod species of which the male possesses a penis. Believed to have the largest eyes of any animal.
"Did you hear about that colossal squid carcass they found in Antarctica? It was huge!"
by Penguinjockey December 18, 2006

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