Most of us know the "F word." The word not used in polite society, but so useful. Battlestar Galatica uses a different word, but for the same meaning: "frak." Since this is not a bad word in English, they can use it as much as they want on the show. And they do!
Battlestar Galactica - Frak Compilation 1
Battlestar Galactica: What the Frak is Going On?