The 'Repent Sinner' meme is a versatile reaction image typically featuring a religious figure, such as a knight, priest, or a personification of a deity, demanding penance for a perceived 'sin.' While the phrase has long been a staple of religious street preaching, its internet manifestation often satirizes modern behavior, niche fandoms, or questionable lifestyle choices. It gained traction as a reaction image used to humorously condemn 'degenerate' content or absurd social media posts. By placing the viewer in the position of the transgressor, it creates a comedic juxtaposition between ancient moral authority and chaotic digital-age activities.