Fuck /fŭk/ -

v. fucked, fuck·ing, fucks

v. tr.

1. To have sexual intercourse with.
2. To take advantage of, betray, or cheat; victimize.
3. Used in the imperative as a signal of angry dismissal.

v. intr.

1. To engage in sexual intercourse.
2. To act wastefully or foolishly.
3. To interfere; meddle. Often used with with.

n.

1. An act of sexual intercourse.
2. A partner in sexual intercourse.
3. A despised person.
4. Used as an intensive: What the fuck did you do that for?

interj. Used to express extreme displeasure.

Phrasal Verb(s):
fuck off

1. Used in the imperative as a signal of angry dismissal.
2. To spend time idly.
3. To masturbate.

fuck over
To treat unfairly; take advantage of.
fuck up

1. To make a mistake; bungle something.
2. To act carelessly, foolishly, or incorrectly.
3. To cause to be intoxicated.

[Middle English, attested in pseudo-Latin fuccant, (they) fuck, deciphered from gxddbov.]



also:

WTF
who/what/why the fuck? The universal interrogative particle. Also WTH.

(courtesy of the American Heritage Dictionary)