Pronunciation: (hang'up"),[key] —n.Slang. 1. a preoccupation, fixation, or psychological block; complex: His hang-up is trying to outdo his brother. 2. a source of annoying difficulty or burden; impediment; snag: The most serious hang-up the project has is a shortage of funds. 3. a fixture, object, or decoration that can be affixed to a wall, ceiling, other objects, etc.: He brightened up the room with flower baskets and other hang-ups.Also,hang'up".