Mudeo

Johnnie Barber was hero of Cal Tech's annual freshman-sophomore "Mudeo" at Pasadena on Nov. 10. Chief event of the "Mudeo" is a tire derby in which rival classmen battle to carry tires across others' goal line. Sophomore Barber bore four.

Source: wiktionary

The Mudeo will be held at 2:30 p.m. at the south end of Caltech athletic field, formerly Tournament Park.

Source: wiktionary

University of Colorado students opened a two-day spring fun festival with a "Mudeo." The point of the contest was vague to spectators but a score of jeans-clad coeds and students, representing two teams, covered each other with the stuff. A few unwary spectators were dragged into the mire, too.

Source: wiktionary

On the following day there was going to be a schoolwide freshman versus sophomore mudeo (various forms of wrestling and tug of wars that take place in the mud). Late in the evening, into our fraternity comes a whole bunch of sophomores—some from our fraternity and some from outside—and they kidnap us: they want us to be tired the next day so they can win.

Source: wiktionary