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22.
A "gibson" is when a person says something socialy and or politicaly incorrect with out knowing it is very unpopualr at the time. They may or may not believe this statment they have made.

History: The term "gibson" was coined after Mel Gibson, while intoxicated, made an antijewish remark.
The elected offical mindlessly shouted out a gibson. He will never win an election again.

Don't pull a gibson.

This guy in class pulled a gibson, now the proffesor hates him.
by Aaron Lojewski August 07, 2006