[quote=@Balance]
<Snipped quote by DarkwolfX37>

What does "onii" signify?
[/quote]

It's literally "big brother" but it's also used as a term of respect for older males that you aren't acquainted with. The female version/"big sister" is onee, and a good example of it being used non-literally is at the Olympics. You can find videos with japanese fans shouting onii or onee followed by an honorific, usually san or chan, since names are more personal in japanese culture.
There's your foreignness lesson for the day. :P