The exact origin of this 'I am not an opossum' clip is undocumented, as it appears to come from a user-uploaded soundboard rather than a known show or film. Online it circulates as an absurdist denial meme, the kind of random one-liner that thrives on short-form video and meme soundboards. Its appeal is the specific, unexpected animal choice, which makes a generic denial feel fresh. Creators keep reusing it because deadpan animal denials are endlessly remixable for reaction edits.