Top Definition
A squid-whale hybrid that is a highly aggressive/ill-tempered, formidable predator. An invertebrate sea mammal with a squid head equipped with slashing tentacles and a beak, but a whale body.
Our ship was attacked by a Killer sqwhale on our journey to the Canary Islands. It was cantankerous!
by Killer Sqwhale September 26, 2010

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