1 An informal greeting, typically used online.

2 The name of a small code designed to cloak English for private messasing (pronounced oh - hi - tar)
3 Internet spelling for "Oh hello there."

Also written as ohai thar
Ohaithar nice to meet you

Ohaithar person

I speak Ohaithar.
by Sofa Worshippers March 14, 2010
Another way of saying "Oh, Hey there!"

As started on the freenode network channel #tyreus
Ambur has joined #tyreus
<Brad_R> O hai thar, Ambur!
<Ambur> O hai!
by BwaddArr / Monkie / MrMonkie January 16, 2010

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