Pigeon English is a term used to describe the language of people who are not native English speakers. It is characterized by incorrect grammar, mispronunciation, and the use of slang. The term COO (3 letters) is an acronym for Chief Operating Officer, which is a senior executive responsible for managing the day-to-day operations of a company. COOS (4 letters) is an acronym for Chief Operating Officer Support, which is a role that provides assistance to the COO in order to ensure the smooth running of the organization.