As a Noun: 1. The expression you have when you are unhappy, displeased, or being unfriendly by turning down the corners of your mouth. 2. The feeling of displeasure you have when something unwanted or unwelcome has happened. English = unhappiness. As a Verb or Adjective: 1. To show that you are unhappy, displeased, or being unfriendly by turning down the corners of your mouth. 2. To feel displeasure when something unwanted or unwelcome has happened. English = (be) unhappy.