A person or an agency secretly in the service of another.
A lump or chunk, especially of earth or clay.
A stupid person; a dolt.
Find another word for dumbo. In this page you can discover 13 synonyms, antonyms, idiomatic expressions, and related words for dumbo, like: numskull, blockhead, chump, dummy, thickhead, dimwit, clod, dolt, dullard, dummkopf and dunce.