An UPPITY person (6 letters) is someone who is haughty and behaves as if they are superior to others. An UPSTART (7 letters) is someone who has recently achieved a higher social status and is overly proud of it. A WHIPPERSNAPPER (14 letters) is an arrogant or presumptuous person, usually young, who believes they know more than they actually do. Finally, a SNIP (4 letters) is someone who is overly confident and thinks they are better than everyone else. All of these terms refer to an arrogant or presumptuous person.