A host for a parasite or symbiote, as opposed to a host for something on the net. Here's a nifty thing to do: Get a friend and get into a crowded elevator. One of you say, in the most demonic voice you can muster, "I must find a new host body", and then slump to the floor (or at least against the wall) with your eyes closed. The other person jerks their head, gets an evil look in their eyes, and says (again, in a demonic voice), "Much better." Watch the reactions of the crowd.