I'm waiting on/in line.

What is meant by line here?
in line=in queue, online=one the internet/telephone

Do you say queue? This word is weird.
What I meant is, for example, to buy a ticket, you must get in\on line and waiting in\on line..

The word is quite familiar to me, a software engineer.
It is British English word for American line.

You wait in [a] line (AmE) or wait in a queue (BrE).

I guess you will hear New Yorkers say "on line" when they actually mean "in line", but I imagine this is a regional thing.

Also, I don't think that the word "guy" is necessary in your first sentence, CharmYou. The listener will most certainly know you're talking to him without being addressed as a "guy". You may a

Thank you.