Translate from Greek to English:
1. Eho megala vizha
2. Ehis megala arhidiya

Hi Shurik79,
  
"Eho megala vizha" simply means, "I have big breasts".
  
('Eho' = I have / 'megala' = big (pl.) / 'vizha' or 'vizia' = breasts (pl.)
  
  
Similarly, "Ehis megala arhidiya" means, "You have big testicles".
  
('Ehis' = You (sing.) have / 'megala' = big (pl.) / 'arhidya' or
'arhidia' = testicles (pl.)
  
    
I should note "vizia" is more of a slang term for breasts, much like
the word "tits".
"Arhidia" is also a slang term for 'testicles' -- "balls" or
"bollocks" could be used in place.
  
  
Links:
  
Urban Dictionary - definition of Greek word "arhidi" 
http://www.urbandictionary.com/define.php?term=arhidi
  
Urban Dictionary - definition of Greek word "vizia" 
http://www.urbandictionary.com/define.php?term=vizia
  
  
I hope this answers your question. If anything is unclear, please
request clarification.
  
  
Best regards,
  
Jackburton-ga