Dictionary.com
definitions
  • synonyms

Fat Man

See more synonyms for Fat Man on Thesaurus.com
noun
  1. the code name for the plutonium-core, implosion-type atom bomb the U.S. first tested and then dropped on Nagasaki in 1945.
Show More
Compare Little Boy.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018