a hoya. when my brother was visiting georgetown deciding where he wanted to go to college, they told us the "what rocks" version. but don't worry, my brother picked ND. Beat the Hoyas.
http://www.thehoya.com/about/what.cfm
The origins of the word "Hoya" defy simple explanation. Over the years, some have claimed it is an Indian word, while those of a legal mind thought it related to the French word oyez, the traditional opening of judicial sessions. Still others held that with Georgetown's location along a river, Hoya might be an offshoot of the nautical "ahoy". None of these claims have held water, so to speak.
The official explanation holds that there was a baseball team at Georgetown called the "Stonewalls". It is suggested that a student, applying Greek and Latin, dubbed the team the "hoia saxa" — hoia is the Greek neuter plural for "what" or "what a", while saxa is the Latin neuter plural for "rock". Substituting a "y" for an "i"; "hoya saxa" literally means "what rocks".
To this day, however, no one has proven exactly when and under what circumstances the yell originated. While there was a Stonewalls team between 1866 and 1873, an actual reference to the team is pure speculation. Some have held that "hoia saxa" referred not to the team but its surroundings — the team's field (the present site of Copley Lawn) was bounded by the College Walls along 37th Street. One theory holds that words such as saxa (Latin for "rocks") were scribbled on the walls for years and a similar phrase may have simply been adopted by fans of the baseball team.
In 1920, the student newspaper known as The Hilltopper petitioned the Rev. Coleman Nevils, S.J., Dean of the College, to change its name to The Hoya to be more representative of the university. Nevils, enthusiastically approved the change.
As The Hoya was often cited by sportswriters covering Georgetown sports in the 1920's, it took only a few years for a nickname to be born. By the fall of 1928, a Hoya sportswriter began to refer to the football team as the "Hoyas" rather than its contemporary nickname of the "Hilltoppers". The change was picked up by local writers as basketball season began, and Hoyas became the official Georgetown nickname within a few years.