Derived from the Ag of Agricultural & Mechanical commonly associated with universities established under the Morrill Act of July 2, 1862.
These schools each have roots in agricultural science and have therefore adopted the Aggie as their athletic mascot. What an Aggie is varies depending on the school. Texas A & M has a Collie dog named Reveille as it's mascot. Utah State University uses a bull which they call Big Blue. New Mexico State has a cowboy named Pistol Pete.
An Aggie from Texas A&M probably knows a thing or two about massive bonfires.
"He's driving a Ferrari, has two supermodels, and lives in a 20,000 sq ft house, all while maintaining a friendly attitude"