An overly enthusiastic exclamation for "omg". The ending consonant is emphasized with "aa" to display a sense of extra shock or disbelief. Can be applied to many other words as well.

an add on to hax, omg hax refeers to the art of being sarcastically scared of someone's scripts

1 -TEH BESST BAND IN TEH WORLD OMG U HAB TO HEAR THEM BAM MARGERA.

not caps

CAPS

1- A Slang term usually used with I 'just got PWNED' or 'that dude is so 1337
2-see omg h4x

Discovered by The Legendary Wordsmith Eric during an archaeological expedition to the darkest corners of the internet, this singular entity known only as Lord Omg'Wtf is revered by several degraded and nefarious cults as the God of the Internet.
It is prophesised that Lord Omg'Wtf shall one day rise from his digital crypt, to spread madness and mayhem across the land. As his influence grows, those who fall under his command will forever speak in his dreaded tongue, known by his initiates as "L337".
Chain letters are His Unholy Gospel;
spam is His Wrath. Beware the accursed sigil of the Omg'Wtf cult, a curious inscription consisting of a colon and a single parenthesis.
These cults are known to engage in orgiastic license during their worship of His Icon, a pixel-based sculpture depicting His faceless, sickly-yellow bipedal form running, nay, chasing his prey on the Day of His Resurrection.

A series of contractions when you're surprised and don't know what in God's name is going on. Often used by a n00b.
See also: omg, lol, wtf.

An expression typically used by trance junkies, when they hear a decent track.

Sometimes it can be used in the ironic sense, and needn't be associated with a track of outstanding musical merit. For example, upon hearing 'Tiesto - Traffic', while hardly a work of genius, omg choon would still be an appropriate reaction, because, well...it's 'Traffic' innit.

See: OMG I DIE, omgtijs, etc.