What does my weird dream mean? Is having strange dreams a type of sleep disorder?

Dreams. There is no scientifc validity to theories of dream interpretation and much of Hobson and Stickgold's reasearch has disproven Freudian dream interpretation. Dream work occurs a a cellular level and the most important thing to remember is that we want to peacefully sleep through them. See provider info and book.
Not really. Interpretation of dreams has been the subject of theologians and philosophers for centuries. But, having strange dreams in and of themselves doesn't necessarily mean you have a sleep disorder. Having said that, some medications, like chantix, are known to cause very vivid and sometime disturbing dreams. Also, after alcohol, you can have vivid, strange dreams, too.