F*ck
From Tardis Wiki, the free Doctor Who reference
Fuck was a profane word, sometimes used as a synonym for sex.
The word was used in the expressions "what the fuck?" (TV: Everything Changes, Countrycide) and "fuck knows", (TV: Random Shoes, End of Days) and the terms "fucker" (TV: Countrycide) and "fuck buddy". (TV: Out of Time)
Gwen Cooper once shouted, "Fuck you!" at Jack Harkness after he taunted her for her affair with Owen Harper. (TV: End of Days)
Owen used the word to call a group of cannibals "sick fuckers". (TV: Countrycide)
Rhys Williams once in a fit of rage told Gwen to, "sit the fuck down!" (TV: Combat)
