The Rice University Neologisms Database

a prank or joke performed on an opposing person or group, usually in secret. This word is a clipping of the word hijack. However, the clipping has undergone a change in meaning through zero derivation. The word “jack” as Rice students use has a slightly different meaning than “hijack.” I have not encountered this word outside of the Rice community, so it’s possible it was formed at Rice. It is a word used to describe a prank pulled on an opposing residential college. This word is characteristic of some of the Rice lingo that has developed around such events as Beer Bike and O-week.