- An unidentified flying object of a kind reported by US pilots during World War II, usually described as a bright light or ball of fire.More example sentences
- The above is a typical example of an encounter with a ‘foo fighter.’
- Some RCAF buddies talk about the foo fighters they saw over Europe in the last real war.
1940s: from the comic strip Smokey Stover (created in 1935 by Bill Holman (1903–1987)), whose title character used the invented term to mean 'firefighter'.
More definitions of foo fighterDefinition of foo fighter in:
- The British & World English dictionary