It is a way of saying "hi" or "hello" but it is much better then both of those words put together. Its "hoi". You can also change the word "bye" into "boi" when you are leaving the conversation. This can be used on facebook or in real life. it cannot be used to replace the word "high", only "hi" and "hello".
by matthewsy123 June 17, 2011
Technically the line underscore line is something that you tell somebody when they are being a dumbass
by matthewsy123 October 17, 2010