The chant comes from Billy Madison, the 1995 Adam Sandler comedy about a man repeating school to inherit his father's company. The O'Doyles are the red-headed bully family who torment Billy at every grade level, and their smug O'Doyle Rules slogan becomes a running gag throughout the film. The joke stuck in 90s pop culture and later moved to forums, soundboards and short video edits, where the clip survives as a compact quote for bragging, teasing rivals, and marking an overconfident moment before something goes wrong.