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A slap upside the back of the head usually done to someone who did or said something stupid. It was invented by Leroy Jethro Gibbs.
DiNozzo: "An assisted suicide of a suicide bomber whose suicide was before his suicide bombing. It's like how much wood can a woodchuck chuck if a woodchuck could chuck..."
Gibbs gibbs slaps him.
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A sharp, upward slap to the back of the head given to someone acting blaringly stupid. Originated from Special Agent Gibbs from NCIS who employs this manuver often.
"Dude, your mom is so hot."
*Gibbs-slap*
"What? Well she is..."
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Made famous by Special Agent Leroy Jethro Gibbs (Mark Harmon) on the t.v. show NCIS, this is an open-handed slap to the back of the head. This is usually done in response to an act of stupidity. Done in a half-serious way to show power.
Once at work, I was playing Tetris on my computer. When the boss saw, he Gibbs slapped the hell outta me!
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When someone's stupidity is so painful to watch that the pain has to be shared via a open-handed slap to the head.
John: *overwhelmingly idiotic jibber-jabber*
Suzy: I'm about to Gibbs slap you if you don't shut up.
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A slap upside the back of the head a la Leroy Jethroe Gibbs from NCIS usually done to someone who did or said something stupid.
Don Gibbs slapped after I asked him to shower with him.
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the art of slapping the upside of your head, usually follows after someone says or does something insanely stupid. Leroy Gethro Gibbs started this trend in NCIS to knock some sense into his team.
Also can be used as a warning before a bitch slap.
Laura gave me a gibb slap after she found out that the fall off the roof hadn't hurt me.
Girl 1: My boyfriend and I broke up last night when I bitch slapped him for checking out another girl's ass
Girl 2: You should have just gave him a gibb slap and you two would still be together.
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