"Sailor Mouth" is the first segment of the 18th episode of the second season, and the 38th overall episode of the American animated television series SpongeBob SquarePants. It originally aired on Nickelodeon in the United States on September 21, 2001. In the episode, SpongeBob reads a "bad word" off a dumpster behind the Krusty Krab, but does not know what it means, Series creator Stephen Hillenburg has described the episode plot as "a classic thing all kids go through." Much of the storyline for the episode was inspired by the writers' own experiences from childhood. The episode originally aired on Nickelodeon in the United States on September 21, 2001. The episode marks the introduction of Mr. Krabs' mother, Mama Krabs, who was voiced by former SpongeBob SquarePants creative producer and executive producer Paul Tibbitt.
The writing staff used their individual childhood experiences as inspirations to come up with much of the story lines for this episode.
The initial decision to use dolphin noises in place of a traditional bleep was influenced by concerns over the episode's suitability for its audience. Stephen Hillenburg recalled in 2016, "I pitched the idea that SpongeBob and Patrick learn a swearword. Everyone said no. I couldn't even use a bleep. So I used a dolphin sound instead." Voice actor Tom Kenny reveals in the description of this episode in the iTunes collection SpongeBob SquarePants: Tom Kenny's Top 20 that they actually improvised fake profanities that would be censored by the humorous sound effects later. He adds jokingly, "I was laughing so hard [recording this episode], they recorded me while I lay on the floor of the sound booth."
The scene where SpongeBob and Patrick playing a game of Eels and Escalators was difficult for the crew to animate, since many shots featured certain board pieces changing location.
Uncensored cut
In a 2016 ConnectiCon panel, Kenny revealed the existence of an uncensored cut of the episode that the public would "never be allowed to hear, ever". According to Kenny, the original script called for the voice actors to ad-lib fake profanities, but this proved to be too difficult and time-consuming. At Kenny's suggestion, Stephen Hillenburg granted permission for the actors to actually swear, reasoning that the final cut was always intended to be censored regardless.
At the 2021 Los Angeles Comic Con, Kenny and co-star Rodger Bumpass once again addressed the "uncensored cut", where Bumpass also confirmed the cut's existence. The latter would go on to comment that the studio would routinely record and archive all takes for every episode, including the unedited takes for "Sailor Mouth". Bumpass speculated that the recording is still in the possession of Nickelodeon, along with other "off-color" takes.
Release
"Sailor Mouth" was released on the DVD compilation called SpongeBob SquarePants: Sea Stories on November 5, 2002. It was also included in the SpongeBob SquarePants: The Complete 2nd Season DVD released on October 5, 2004. On September 22, 2009, "Sailor Mouth" was released on the SpongeBob SquarePants: The First 100 Episodes DVD, alongside all the episodes of seasons one through five.
Reception
Barry Levitt of Vulture included "Sailor Mouth" in his "25 Essential Episodes of SpongeBob SquarePants" list, lauding the episode's numerous gags. John Witiw of MovieWeb ranked "Sailor Mouth" ninth in his "Top 10 Funniest Episodes to Re-watch as an Adult" ranking. He noted that as the episode uses dolphin noises to censor the swear words, older viewers could fill in the blanks for themselves.
Erik Wiese, who helped to storyboard "Sailor Mouth", considers it to be his favorite episode, mainly due to its random and satirical nature, saying "Sometimes SpongeBob just catches me off-guard." The Eels and Escalators board game from the episode has become a memorable scene among fans. In 2021, BoxLunch and Nickelodeon collaborated to produce a re-creation of the board game.