A great way to not sound like a child when showing displeasure with a situation, person, action, outcome or any other thing that might go wrong in your sad little life.
This will, however, not simulate being an adult who has the balls to use big kid words. This might make you appear (based on delivery, situation and volume) 12 to 16 years of age unless you -are- said age, in which case present company's level of sobriety will determine how much of a tool you look like. The higher your company the greater the return.
Used mostly in Multiplayer Video Games to work around chat filters and to evade the Terms of Use which often frown upon language that might be considered harsh by people who think you should have their ideals.

A variant of "fuck" used on Canadian television, primarily "Royal Canadian Air Farce". Youths have been known to use it while quoting, if the word "fuck" should come up in the quotation.

Shortened and alternate version of the "F" word. Go figure.

Eff: Explitive loosely related to the word "fuck" but more directly related to the word(s) "shit", "damn", "crap", "holy pancakes batman" etc. Was introduced to mainstream society as a club for underpriviledged teens and quickly became a worldwide slang for "dirty" words.

Electronic Frontiers Foundation
The non-profit organization trying to prevent RIAA from becoming the dictator of the world.

the shorted proper form of fuck

a way to say 'fuck' without actually saying it.

Used to show displeasure with something or someone.