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It's either in 1955
History says that a man named Harley Clark, who was head cheerleader at the University of Texas, introduced the Hook em Horns sign in 1955.
Texas Hook Em' Horns
Creating the Hook 'Em Horns sign
Lambert High School's motto is 'Hook 'Em Horns'.
No gold, no value...throw it away!
HOOK 'EM HORNS!