Also the nickname for one who is a fan of, or attends the University of Florida in Gainesville, Fl; USA.
The rival of any respectable Gator is a Florida State University, or Seminole, student or fan.

Growing up I was in a constant state of flux, emotionally torn between these two schools...I had elder relatives who attended college in a time when the two schools were separated by gender. Grandmother went to FSU; great uncle Maynard went to UF. Ho hum.