Who's johnny?

I met a guy yesterday who said his name was Johnny he
said, "they write songs about me, I know they
do." It came as quite a surprise in fact it
opened my eyes and now I realize it's true. Johnny?
Who's Johnny? and so I asked him hey Johnny where's
your two bags and Jimmy and he just looked at me,
funny you know like I was weird, I said now if it's
really you, and if what you say is really true then
you'd know what I'm saying? Just what am I saying? do
you know what I'm saying?