THREAD NECROMANCY - a form of witchcraft, in which the practitioners believe they can communicate with the dead by creating a special woven cloth. They then cast a spell on a spool of thread, and use the thread to create an image of the deceased person.
ALIEN SPACE BAT - Something which US government bureaucrats came up with. Illegal or Legal Alien residents in the US are given papers which authorize them to have living quarters and an occupation at such-and-such a place for such-and-such period of time. This living space, or working space, is known as "alien space." The papers are contained for convenience in a 12-inch-long hollow tube, known as a bat; hence, "alien space bat." The bureaucrat who came up with the idea was either a rabid baseball fan, a rabid sci-fi fan, or both, or had a weird sense of humor.
TROLL - A kind of dance done in nightclubs, especially the kind supposedly typical of obese persons; a contraction of the phrase, "FA T R OCK and R OLL"
BANHAMMER - A type of hammer used in the construction industry for removing pesky nails and the like.