"Sailor Mouth" is the 18th episode of the second season

SpongeBob SquarePants (season 2)

Season Two of the animated television comedy, SpongeBob SquarePants on Nickelodeon aired twenty episodes from October 26, 2000, with the episodes "Something Smells" and "Bossy Boots", to July 26, 2003 with "Gary Takes a Bath" officially ending season 2...

 of SpongeBob SquarePants

SpongeBob SquarePants

SpongeBob SquarePants is an American animated television series, created by marine biologist and animator Stephen Hillenburg. Much of the series centers on the exploits and adventures of the title character and his various friends in the underwater city of "Bikini Bottom"...

. It first aired on Nickelodeon

Nickelodeon (TV channel)

Nickelodeon, often simply called Nick and originally named Pinwheel, is an American children's channel owned by MTV Networks, a subsidiary of Viacom International. The channel is primarily aimed at children ages 7–17, with the exception of their weekday morning program block aimed at preschoolers...

 on September 21, 2001. In the episode, SpongeBob

SpongeBob SquarePants (character)

SpongeBob SquarePants is a main fictional character in the animated television series SpongeBob SquarePants. He is voiced by Tom Kenny and first appeared on television in the series' pilot episode "Help Wanted" on May 1, 1999. SpongeBob was created and designed by cartoonist Stephen Hillenburg...

 and Patrick

Patrick Star

Patrick Star is the deuteragonist of the Nickelodeon animated comedy series SpongeBob SquarePants, created by creator Stephen Hillenburg and voiced by Bill Fagerbakke. Patrick's most significant character trait is his lack of common sense, which sometimes makes him a negative influence on his best...

 discover graffiti scribbled on the dumpster of the Krusty Krab. Patrick explains that this "word" is a "sentence enhancer" used by people who want to talk fancy. The next day, SpongeBob and Patrick begin saying the word more often, much to the offense and shock of the Krusty Krab patrons.