WordReference Random House Unabridged Dictionary of American English © 2026
Fat′ Man′, 
  1. Militarythe code name for the plutonium-core, implosion-type atom bomb the U.S. first tested and then dropped on Nagasaki in 1945. Cf. Little Boy.

'Fat Man' also found in these entries (note: many are not synonyms or translations):

Forum discussions with the word(s) "Fat Man" in the title:


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