To be "exiled" or banished from the dorm while it is being used by a roommate wanting privacy for (often overnight) sexual activity.
It is a common phenomenon at college, often done willingly by arrangement, which may include telltale signs to show the room is being used (i.e. a strategically placed sock or tie). Where sexiling becomes too regular and inconsiderate, the solution is another Urban Dictionary favourite = Cockblocking.
I was sexiled last night when Brad wanted to take a girl back to our room to stay the night.