Chaos/Legends

"Chaos take your mission!"

- Darth Vader, to Raymus Antilles

Chaos, referred to as Hell in Corellian mythology and also known as The Void, was a reputedly dark region of the Netherworld of the Force inhabited by the spirits of deceased Dark Lords of the Sith, Dark Jedi, and the spirits of all evil sentient beings who had died. In Naboo mythology, Chaos was envisioned as a dark pit kept closed by six impenetrable gates.

History
"Similarly, Chaos is where dead Sith Lords are believed to dwell in torment."

- Darth Plagueis

The Dark Underlord was said to have been summoned from the realm of Chaos by a Sith Acolyte during the New Sith Wars. Palpatine's soul fell into this realm following his final death, where he would be a wandering, disembodied spirit residing in perpetual madness. Marka Ragnos's spirit was summoned from Chaos by Tavion Axmis and the Disciples of Ragnos, though Ragnos was summarily defeated and returned to the netherworld by Jaden Korr. It was believed that if a Force user's body perished after a failed attempt at transferring essence, the user's life energy was lost and dispersed in Chaos. Darth Plagueis once reported that, according to legend, those who failed to punish their enemies during their lifetime would be forced to harbor their ill feelings in Chaos forever. Plagueis, however, didn't believe Chaos was a real place, but only the perception of imminent dissolution some beings felt when they died. In his opinion, only stronger minds who refused the loss of their identity would perceive this pain. Chaos was also briefly referenced by House Palpatine Patriarch Cosinga Palpatine, citing that House Palpatine was one of the six gates separating Chaos. Chaos was not inescapable, however: Darth Sidious, after perishing during the Battle of Endor, had escaped Chaos with the help of Sith Spirits and Sate Pestage, and required several deceased Jedi to ensure he never escaped again after his final death at Onderon.

Chaos in language
"Then I'll see you in hell!"

- Han Solo

"Chaos take me" was also sometimes used as a mild expletive, when the speaker decided to do something they knew was not very wise. Saying "Go to Hell" or "See you in Hell" were similarly used as expletives meant to insult or threaten whoever the speaker was saying them to. Another use was in the phrase, "There will be Hell to pay." They can also be used when either startled or if expressing disbelief regarding someone's story, evidenced by the phrases "What the hell is that?" and "Like hell you did!", respectively. A similar phrase, "Where the hell are you going?!", can also be used in the context of the former.

Beings destined for hell were considered "damned." The phrase "Damn" is also sometimes used as an expletive, either for emphasis or to curse someone.

Don-Wan Kihotay used the term hell-spawned to refer to demonic things like the Behemoth from the World Below's fin bolts.

Behind the scenes
Hell was used twice as an expletive in the Clone Wars episode Rookies during its initial airings, although it ended up censored in subsequent reairings.