αι - what does it mean?

Question

This little word "αι".  I see it in front of phrases.  What does it mean exactly?

αι στο καλό

αι Γιάννης  =  (means Saint John ?)

etc.

 

Answer 1

Αη-Γιάννης (this is the correct spelling) means Saint John. Αη comes from the word Άγιος( = Saint).

Άει στο καλό means "I don't believe you" or "get lost!" Αει or άντε or άιντε means "go to".

Other similar expressions:

"'Aει χάσου", "'Αει στα κομμάτια", "Αει στο διάολο". All these phrases are swear words and they mean " get lost", "go to Hell".

For more details about άντε, check this answer:
https://learn-greek-online.com/ask-greek/188/please-what-is-the-meaning-of-ante