The larger version of boob.

A Boob is just a "boob" while KAboob refers to the "WOW" effect version of boob. Someone who is truly a boob, becomes a kaboob.

A joining of kaboom and boob
Guy#1: "I forgot to pay my light bill again..."

Guy#2: "You're such a kaboob."
by yidip July 28, 2011

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