"Fuck" is perhaps the most versatile and most-used word in the English language. It can relate anger, surprise, dismay, joy, and a variety of other emotions. It is also quite commonly used as a word of emphasis or description, often with comical effect. For some good examples, refer to "English as a Second Fucking Language," by Sterling Johnson, which can be found on Amazon.com. Also check out comic Dane Cook's take on the word.
Also, on a rather interesting note, I read somewhere that fucking
once described an act in which a person who sowed/planted seeds in a field, and those particular people were referred to as fuckers
The guy who quoted Monty Python
had it wrong. I believe the quoted text is attributed to George Carlin
Why don't you go play hide-and-go-fuck-yourself?
I don't mean to tell you how to do your job, but GO FUCK YOURSELF!
Fine, I'm sorry, I'm sorry, UN-fuck you!
Cartman: Don't call me fat, you fucking Jew!
Mr. Garrison: Eric, did you just say the F-word?
Kyle: No, he's talking about "fuck." You can't say "fuck" in school, you fucking fat-ass!
Cartman: Why the fuck not?
Mr. Garrison: Eric!
Stan: Dude, you just said "fuck" again!
Mr. Garrison: Stanley!
Mr. Garrison: Kenny!
Cartman: What's the big deal? It doesn't hurt anybody. Fuck-fuckety-fuck-fuck-fuck.
Mr. Garrison: How would you like to go see the school counselor?
Cartman: How would you like to suck my balls?
Mr. Garrison: What did you say?
Cartman: I'm sorry, I'm sorry. Actually, what I said was... (picks up a megaphone) HOW WOULD YOU LIKE TO SUCK MY BALLS?
Stan: Holy shit, dude.
-from South Park: Bigger, Longer, and Uncut-