Mametchi is the best known Tamagotchi character, the smart and well behaved mascot of the virtual pet franchise that began in Japan in the 1990s. Calling him a big fat meanie flips that sweet image, which is why the line spread on soundboards as a joke insult rather than a serious quote. The clip is shared in meme edits and reaction posts where a childish voice stands in for someone pretending to cry, complain or sulk after a very small disappointment or teasing moment online.