From Longman Dictionary of Contemporary Englishjumbojum‧bo /ˈdʒʌmbəʊ $ -boʊ/ adjective [only before noun] informal BIGlarger than other things of the same type jumbo-sized hot dogs
Examples from the Corpus
jumbo• jumbo shrimpJumboJum‧bo /ˈdʒʌmbəʊ/ a name for an elephant, used especially by children and in children's stories and songsFrom Longman Business Dictionaryjumbojum‧bo /ˈdʒʌmbəʊ-boʊ/ adjective [only before a noun] larger than the usual sizeJumbo loans carry higher interest rates than smaller loans.Origin jumbo (1800-1900) Jumbo, name of a very large elephant put on show in London and the U.S. in the 19th century, perhaps from mumbo-jumbo 