The term 'Musical Domino' refers to the popular game of dominoes, which is played with tiles that have dots on them. The game is usually played by two or more players who take turns placing tiles on the table in order to form a line of tiles. The term 'Fats' is a four-letter word that is used to refer to the musical style of Fats Domino, an American singer and pianist who was popular in the 1950s and 1960s. He was known for his distinctive style of rhythm and blues music, which was characterized by a heavy use of the piano and a strong emphasis on the beat.