From Gaslamp Ball Wiki - A Wiki for San Diego Padres Fans
It all began when sdsuaztec4 infamously included Schilling in his response to a post in which Dex asked, Who are you not allowed to hate in baseball?. Many GLBers piled on and gave numerous examples of why Schilling can easily be hated. sdsuaztec4 did his best to change the subject and play it off, but the damage had been done.
To this day, it is still used as a reference to something being way off base or just a response to someone posting a one word question. It has no actual meaning beyond mocking sdsuaztec4.