an expression for someone who overuses his vehicle's horn, specifically holding it down for more than a second at a time.

a horn happy person is usually particularly impatient on the road, and doesn't understand that holding down a vehicle's horn is an aggressive action that causes physical discomfort and harm to people (pedestrians, cyclists and rollerbladers) in the immediate vicinity of the car, in addition to irritating people who live in the area.

horn happy people are usually unaware of just how little actual value is added by their hooting - a typical result of a lengthy hoot is the slowing down or stopping of the person in front to see what all the trouble is.

A pick me is a woman that is willing to do anything for male approval. She will embarrass or throw other women under the bus to achieve this goal. The unfortunate thing about a pick me is usually the men they are trying to seek approval from are of poor quality and treat women badly, leaving little real benefit for the pick me.