"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, which gets him into trouble with others.