Sorry to disappoint, but not being a football fan of any stripe and a Texas Transplant to boot, not to mention that the Aggies are the
other guys and the enemies in and around Austin, which is UT Country [College Station, home of A&M is 100 miles east], I have not the requisite background.
I did a quick Google and came-up empty handed.
I am pretty sure that it's "T-sip" rather than "tea-sip", the "T" standing for Texas.