The term 'unattractive-sounding fruit' refers to the UGLI fruit, which is a hybrid of grapefruit, tangerine, and orange. It was first discovered in Jamaica in 1924 and has since become popular in many parts of the world. The UGLI fruit has a thick, bumpy, and wrinkled skin, which gives it an unattractive appearance. However, its taste is sweet and juicy, making it a popular choice for juicing and eating.