An annoying pest is a creature or thing that causes disruption or annoyance to people. PESTS can include insects, rodents, birds, and other animals, as well as plants and fungi. They can also include certain human behaviors, such as loud music or talking. PESTS can cause damage to property, spread disease, and contaminate food and water sources. In the crossword, the term 'PESTS' is used to describe annoying people or things.