https://www.quora.com/Cheese-eating-surrender-monkeys-was-a-phrase-meant-to-imply-French-cowardice-But-whats-cowardly-about-eating-cheese-A-ripe-Époisse-de-Bourgogne-tastes-delicious-but-if-you-didnt-know-that-it-would-take-courage-to-try-it

“Cheese-eating surrender monkeys” was a line from an episode of the popular and long-running animated series The Simpsons. It was uttered by the chronically ill-tempered school janitor Groundskeeper Willie, who is drawn as a broad stereotype of a Scotsman. As with many other memorable and outre lines from the series, it quickly entered the popular culture, often used as a self-parodying insult. It is most often used when the speaker wants to mock themselves or their statement as coming from an over-the-top misanthrope or crank. It is never intended to be taken literally.”