Don Fighting
A 'sport' practiced on a number of the more remote parts of frontier colonial planets. A number of indiginous creatures, usually large and heavily armoured 'megadons', are herded into a large pit or amphitheatre and encourage to fight each other. The spectators then bet on the result. This activity almost inevitably raises the ire of animal welfare groups.
See also Raptor Racing
Disambiguation: This is not to be confused with the sport of pitting clones of very old wargame authors against each other. That 'sport' is actually better known as 'Featherstoning'.