A word that has become just as overused as the word "random." It originally meant "lack of success" but over-use of the term has caused it to loose meaning.
The act of doing something so awful you must never show your face again and God cries in pity for your soul.
The term can be expressed (written) two ways:
fail & Fail
The lowercase form expresses a smaller fail that no one will remember for longer than a week. Consider yourself lucky if you are simply charged with a "fail" crime.
The uppercase form of the word means that you have disgraced the human race and shall never be given respect again in your life, nor after that when you have gone to Hell either.
"Fail" is a word that is more than often overused online. Unfortunately it has spewed into mainstream society and now is being used in every day life, much like "epic".
People who "fail" generally are not even trying to accomplish anything, or they simply do something different than you. This word is most commonly used by annoying teenagers (who put a bad reputation on gaming), who shout "FAIL!" every time someone makes a slight error.
If you point out an obvious flaw by saying "FAIL" you're obviously a failure yourself for having lack of logic.