Kling

From Memory Alpha, the free Star Trek reference

Kling was a population center or location within the Klingon Empire.

Korris referred to docile Klingons as "the traitors of Kling." (TNG: "Heart of Glory")

[edit] Background

According to the Star Trek Encyclopedia: "At the time the episode was written, Kling was intended as the name of the Klingon Homeworld. Once the episode was filmed, it was realized that the name sounded pretty silly, so later scripts simply referred to "the Homeworld." The only time the Homeworld was given a name was in Star Trek VI: The Undiscovered Country, when it was called Qo'noS, pronounced "kronos."" Of course, since this passage originally appeared in the Encyclopedia, the term "Qo'noS" has been referenced on numerous occasions.

Consequently, Kling has been referenced in the Star Trek Encyclopedia as a "A district or city on the Klingon Homeworld."

Kling was also mentioned as a small note on a very large star chart graphic created for TNG: "Conspiracy". It was the image behind the chair in the room where Dexter Remmick was killed. This graphic implies that Kling was either a star, planet, or region of space.

In the computer game Star Trek: 25th Anniversary the computer data bank mentions the Klingons "originate from the planet Kling."