Bulletstorm, released in February, is probably still 2011's most foul-mouthed game. It may be 2012's most foul-mouthed game, too. It popularized the term "dicktits" after all.
While no character in Bulletstorm has the name, the game's script does seem overly concerned with the activities of someone named "Dick." Here's a compilation - by no means exhaustive - of two-dozen references to aforesaid Mr. Richard, within the span of a minute.
I don't know how you should feel about seeing Epic Games president Mike Capps in the shower. I'm still trying to figure out how I should feel about a game that urges me to preorder by calling me "dick tits."
If your sensibilities can tolerate the incineration and impaling of pus-oozing space zombies, but not the profligate use of cuss words, then Bulletstorm is your game. The raucous shooter will feature an option to tone down its notoriously salty language.