The phrase combines two pieces of internet culture that peaked in the early 2020s. Among Us, the social deduction game by Innersloth released in 2018, turned imposter and sus into everyday slang after its surge in 2020. Rizz later spread on TikTok and Twitch as slang for romantic charm. Mashing them into rizzposter created a label for someone who flirts like a deceptive crewmate, and editors began using the short clip as a reaction sound in gaming memes, Discord edits, and ironic romance jokes.