Bears, Beets, Battlestar Galactica is a phrase from the TV series “The Office”.
The sentence can be heard in one of the scenes where Jim is imitating his coworker Dwight, whose topics of interest include bears, beets and Battlestar Galactica.
The scene can be observed in the twenty first episode of the third season of The Office, titled Product Recall.
In it, Jim is walking into the office, dressed like Dwight, then proceeds on to make fun of his coworker.
The episode aired in 2007 and was the scene was a great success among fans of the show.
With the great appreciation of the fan, the sentence became a catchphrase and the clip has been uploaded to YouTube in several videos, praising the comic genius of Jim.
Urban Dictionary added the phrase to their definitions in 2019, though the term is still relatively unknown to those, who are not so familiar with the TV show.