The term foo-fighter (English neologism composed of French word feu, Fire and fighter, Equipment for hunting) was coined after the Second World War to describe sightings of strange lights in the sky forms that many pilots had made.
Ang katagang foo-manlalaban (Ingles neolohismo binubuo ng Pranses salita feu, Sunog at eruplano, Equipment para sa pangangaso) ay likha matapos ang Second World War upang ilarawan ang sightings ng mga kakaibang mga ilaw sa langit forms na ginagamit ng maraming mga pilots had ginawa.