Battles of Oxen, (noun) a gladiator type; competition popular in Tharna; men are yoked with horns fitted to them; they battle each other in an arena, one trying to gore or maim the other.
"The Battles of Oxen," cried one of the silver masks, and her cry was taken up by ten and then a hundred others. Soon the stands themselves seemed to ring with the cry.
"The Battles of Oxen," cried the women of Tharna.
"Let them begin!"
Book 2, Outlaw of Gor: Page 112