"Oxford Debate" box. A Briefcase, box, or catalog case that holds evidence, papers, briefs for participants in high school or college level policy debate.
A young woman who has had sexual relations with 3 or more brothers of theta chi fraternity. Called so because the Greek letters Theta and Chi resemble the word "ox" in English, while "box" refers to the young lady's now-worn-out vagina. Hence, the "OX" is in the "box".