A thot was a high-ranking military officer in the Breen Confederacy, who could also hold political power.
In 2375, Thot Gor represented the Breen Confederacy in its negotiations with the Dominion. Damar asked Gor whether the rank of thot was equivalent to that of a Cardassian legate. Gor replied in the Breen language, which Damar was unable to understand at the time. When Damar asked what Gor had said, Weyoun responded, "He says you need to get your universal translator adjusted." (DS9: "Strange Bedfellows")
The script for this episode, when introducing Thot Gor, described him as a Breen general.
After the Second Battle of Chin'toka, Gor was succeeded by Thot Pran. (DS9: "Tacking Into the Wind", "What You Leave Behind")
A third thot was created as a playable "character" for the video game Star Trek: Conquest, named (perhaps as a joke) "Thot Rong (β)".