Gueuse is a fascinating and somewhat archaic French word that literally translates to "beggar woman" or "wretch". It's not a word you hear every day, especially in modern French songs.
In Serge Gainsbourg's "Ma Lou Marilou," he uses it as a term of endearment, albeit a rather provocative one, for his beloved. It adds a layer of playful irreverence and a touch of old-world charm to his lyrics, making it a memorable and intriguing choice for learners.