The third season of Big Mouth, an American adult animated coming-of-age sitcom created by Andrew Goldberg, Nick Kroll, Mark Levin, and Jennifer Flackett, was released on Netflix on October 4, 2019; with a Valentine's Day special released several months earlier on February 8, 2019. The series centers on teens based on Kroll and Goldberg's upbringing in suburban New York, with Kroll voicing his fictional younger self. Big Mouth explores puberty while "embrac[ing] a frankness about the human body and sex."
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Rotten Tomatoes, the third season has an approval rating of 97% based on 33 reviews with an average rating of 8.00 out 10. The website's critics consensus reads, "Like the characters at its center, Big Mouths third season continues to grow, taking on complicated new issues with the same gross-but-utterly-empathetic eye that made it so lovable in the first place." On Metacritic, it has a score of 84 out of 100 for the third season, based on five critics, indicating "universal acclaim". On Metacritic, it holds a rating of 80 out of 100, based on six critics, indicating "generally favorable reviews".