The upside-down "e" symbol you always see in dictionary pronunciation guides. Pronounced "uh" or "ih".

1) An expression of excitement, or extreme happiness.
2) Acknowledgement of someone who has greeted you, or a greeting in itself.
3) A state of mind, in which one is relaxed.
4) A neural vowel sound used in the dictionary, depicted as a lowercase letter 'e', rotated 180 degrees counter-clockwise.
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Slang originated from Hashmeer of Group X, who used the phrase "Shiggity shiggity schwa." Eventually, Jager, of The Hoodlums in Upstate New York, began to use Schwa inan every day context.

A "neutral" vowel that sounds like the "uh" sound at the beginning of "about" and is represented by an upside-down lower-case "e" in dictionaries.

Used as a greeting among friends.

A person whom nobody notices. He/She tends to play dirty tricks on people and still go unnoticed. People say that to see a schwa is a real miracle, most people go their whole lives without seeing them. It takes a very observant person to notice the schwa.

The most undefinable word
Usually used in excitement, as a positive description of something, or as a sentence in itself. Extra "a"'s can be added to the end of the word.

n. Any object that has been grabbed by someone and thrust into their pants, making it lost forever.