The crossword solution for the term GAB OR SONG ENDING is FEST. FEST is a four-letter word that can refer to either a lively celebration or an ending of a song. In the context of a lively celebration, FEST is often used to describe a festival, which is a large gathering of people for a particular purpose such as music, art, or food. In the context of a song ending, FEST is often used to describe a crescendo, which is a gradual increase in volume and intensity that leads to a dramatic conclusion.