The term UNPLEASANT SORT refers to three different people who are generally disliked by others. An ALIENATOR is someone who deliberately drives away or separates people from each other, often through hostile behavior. A DIRTBAG is someone who is considered to be morally reprehensible and has a bad reputation. Finally, an OGRE is a mythical creature that is usually depicted as a large, ugly, and cruel being. All three of these terms can be used to describe someone who is unpleasant to be around.