Rocko is the wallaby protagonist of Rocko's Modern Life, the surreal Nickelodeon animated series from the 1990s. Short reaction lines like this one circulate widely on soundboards and meme pages, detached from any single episode, because they work as flexible emotional shorthand. The oh baby delivery fits the show's nervous, good-natured humor. Creators keep reaching for it years later since it reads instantly as affectionate and slightly awkward, a tone that suits modern short-form edits better than louder, more dated cartoon shouts.