Absolutely not; in English this would be considered impudent, patronizing, and rude.Hi guys,
I want to say "hello" to an old stranger in a kind way; it is okay to say "Hi grand" or "Hi uncle"?
Speaking as someone who probably fits the description, I would consider it a profound insult.Well, how about this:
"Good morning, elder mister."
Yeah, were pretty casual here, more's the pity.Maybe buddy is okay depending on where you are. In Australia sometimes I heard it used between two different generations.
I agree with Thomas. As the old guy is a stranger, I might not even know his name. (It may be the first time I met him.)"Good morning Mr Jones. How are you today? "