Une souris verte is a traditional French nursery rhyme that has been taught and sung for generations, especially in early childhood settings. Online, short clips of the song circulate in meme edits, nostalgic posts, and jokes that rely on the contrast between a sweet children's melody and unexpected visuals. Its staying power comes from that instant recognisability for French-speaking audiences and from how easily the tune can shift between sincere nostalgia and dry, surreal humour in short-form video formats.