Cluster F-Bomb/Tabletop Games

Misspent Youth by Robert Bohl, has "fuck" in the first sentence and all throughout it. It's a game where you play teenaged anarchists out to destroy a despot.
Changeling: The Dreaming's Nockers. Their kithbook outright states that half of their profanity is just a verbal tic, and the other half is the result of frustration. Either way, it makes them the most foul-mouthed of all the kiths, and there isn't any method of permanently keeping them from swearing.
In Greg Costikyan's Violence: the Role-Playing Game of Egregious and Repulsive Blood Shed, a vicious satire of the way nearly anything done in the average roleplaying game would be violent sociopathy in real life, one of the ways to earn extra character points is to agree to make one out of every four words out of your character's mouth be an obscenity.
In Don't Rest Your Head's supplement Don't Lose Your Mind, one of the powers is this. Whenever you say fuck, it intesifies things (If you say that there is a fucking fast car it could outspeed a racecar, if a dude is fucking huge he becomes a giant, etc.). Overuse of this power turns you into a perpetually swearing Nightmare known as a Fuckwit.