A tree.
Hey Kelly! Check out that nice gaboo over there!
by strofty December 29, 2018
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someone who probably plays minecraft and listens to undertale ost's
hear about gaboo? he tried to invite me over to see his rock collection yesterday
by Cocoa_Surprise August 16, 2020
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An old game by the name of Monster Rancher 1 & 2 used to have a small, fat, boneless creature called a Gaboo.

Therefore, it became commonplace by its players to call anyone short and fat a “gaboo”, a “gaboo” can also be any person that is particularly gutless and cowardly.
"Jim is such a fucking gaboo."
by John Delonge April 8, 2006
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