A combination of yuppie and uppity. An adjective describing a person in the upper-middle to upper socioeconomic class (usually a yuppie), who acts as if they are above everyone else. Symptoms include snootiness, haughtiness, and generally distasteful treatment of the people around them.
The act of saying yes but in a more jolly way than just a plain yes. Yuppity is saying you truly promise and cannot be a lie. Saying yuppity is always promisingsomething happy and never sad.