The chant comes from Pixar's Finding Nemo, released in 2003, where a flock of seagulls gathers on a buoy near Sydney Harbour and repeats mine as they try to claim Nemo. The scene became a lasting shorthand for greed and territorial behaviour, and clips of the gulls have circulated for years in edits, reaction videos and memes. Its appeal is simple: the word is short, the delivery is frantic, and anyone who has fought over food or a prize recognises the joke immediately.