FUCK
Our most versatile word.  By its stress and inflection, it can describe
many emotions.  No other word can be used with so many grammatical
nuances.  It can be used as a noun (I don't give a fuck!); as an
adjective (...it's a fucking thing of beauty.); as a verb (The game was
fucked up by the weather); and in its intransitive form (Well, he really
fucked it up); in the present tense (I am fucked); in the past tense (I
was fucked); and in the future tense (I'll be fucked!)
Many everyday expressions show its versatility:

       DENIAL          I didn't fucking do it!
       PERPLEXITY      What the fuck do I do now?
       APATHY          Who gives a fuck?
       GREETINGS       How the fuck are ya?
       RESIGNATION     Oh fuck it.
       DERISION        He fucked everything up.
       SUSPICION       What the fuck are you doing?
       PANIC           Let's get the fuck out of here.
       DIRECTION       Luck off.
       DISBELIEF       How the fuck did you do that?
This word has been used by some very notable peole thoughout history.
The more memorable being:
What the fuck was that?                           The Mayor of Hiroshima
Look at all those fucking indians                 General Custer
Where the fuck is all this water coming from?     Captain of the Titanic
That's not a real fucking gun...is it?            John Lennon
Who's going to fucking know?                      Richard Nixon
Heads are going to fucking roll.                  Anne Bollyn
Any fuckhead can understand that.                 Einstein
It fucking looks like her to me.                  Picasso
My fucking hair's on fire.                        Michael Jackson
Go fuck a duck.                                   Walt Disney
You want it on the fucking ceiling??              Michelangelo
This would be a fucking great time for rain.      Joan of Arc
The fucking fucker's fucked...so fuck it.         Irish mechanic