Fob
Probably a proximity access card.
Lancaster
Introduced in 03.1 as a replacement for the outside door key after problems in previous years with one individual losing a door key, forcing the replacement of everyone's outside door key. Fobs make annoying beeping sounds when used to open doors, and work from much closer than is convenient for one's neck. Some students, however, very much enjoy using their fobs to open the doors, sometimes resulting in mock fights as to who will open the door. "Fob" is commonly used as a replacement for *poke* in the lalala game as well as for more nefarious words.
AKA fresh off the boat.
Also, when a camper suggested calling it a "Bob" because of its possibly offensive 2nd definition, it was taken in by a few RAs who afterwards told their students to call it a "Bob" as well.