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Noun: a derogatory term that can be a applied to someone oblivious to their surroundings, recklessly flailing about like a lunatic.

Origin: in reference to the massive genius who got caught smuggling a gibbon into the States by hiding it in a basketball that then rolled away on its own past the feet of a customs officer.
"Hey gibsket, hurry up and put your shoes on, we need to leave!"

"Quit being such a gibsket and make me a sandwich!"

"Sorry I'm late, my boyfriend got lost and was too much of a gibsket to ask for directions."
by Madame Skullcrusher March 17, 2009
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