In the context you posted, it means hook em horns, because it is clear he is in Longhorn Country.....University of Texas
Soon, I’ll be scratching my nose (or something else) and someone will call 911 for making an obscene gesture. The intolerance freaks are inventing things to get their pants in a wad over. I first noticed them long ago and wondered when they would be metering my squares of toilet paper. Sure enough, singer Sheryl Crow declared (maybe as a joke) that one square of toilet paper was sufficient for any restroom visit.
When there is situational ethics with these numskulls, everything is on the table depending on their arbitrary conclusions.