Mr Poopybutthole first appeared in the Rick and Morty episode Total Rickall in 2015, introduced as a cheerful family friend during a story about false memories. His repeated Ooo wee line became the trait viewers remembered most, along with his upbeat manner in serious situations. Clips of the catchphrase later circulated on meme pages and soundboards as a short positive reaction, separate from the episode plot. It remains popular because the phrase is instantly recognisable, family friendly compared with much of the show, and fits almost any small happy moment online.