foo fighter
/fuː/noun
- an unidentified flying object, originally one of a kind reported by US pilots during the Second World War, usually described as a bright light or ball of fire太空斗士(二战期间美军飞行员报告的一种不明飞行物, 通常被描述为明亮的火光或火球)。
词源
1940s: from 'Where there's foo there's fire', a nonsense catchphrase from the US Smoky Stover cartoon strip.