ˌGuinness Book of ˈRecords, The BrE AmE trademark
a book produced every year, which contains facts about people, events, and things that are the biggest, fastest, longest, shortest etc. Many people who are mentioned in The Guinness Book of Records have achieved something that is amusing rather than serious, such as eating the most ↑ pizza or walking backwards for the longest distance. People sometimes talk about ‘getting into the Guinness Book of Records’ when they have done something silly.