The term 'Flying-Saucer Occupant' refers to an ALIEN, which is a creature from outer space that is not native to Earth. Aliens are often depicted as having advanced technology and being able to travel in flying saucers. They are usually portrayed as having humanoid features, such as two arms, two legs, and a head. Aliens are often seen as mysterious and unknown creatures, and their presence on Earth is often seen as a sign of extraterrestrial life.