Captain Underpants began as Dav Pilkey's children's book series in 1997 and later became a DreamWorks animated film in 2017 and a streaming series, with fart jokes as a central running gag. Short clips from that style of humor spread widely on soundboards, where this toot is grouped with other gag effects like fart echo and dry fart. Its popularity comes from the books' schoolyard humor, which generations of young readers recognise instantly, making the sound a shorthand for childish pranks online.