Boxing is a combat sport, in which two people wearing protective gloves throw punches at each other for a predetermined amount of time, overseen by a referee in a boxing ring.
Dave Lister was a fan of boxing, saying that it was a great working class escape and, at best, an art form. Lister often watched recordings of boxing in his sleeping quarters aboard Red Dwarf.
Kryten once walked in on Lister with breakfast as he watched boxing, but Kryten was confused to see that the combatants were topless women who didn't seem to be doing much boxing. ("The Last Day", Series III)