"Τσαμπατζής", or more commonly "τζαμπατής".
The root of “τζαμπατζής” is “τζάμπα”, a word of Turkish origin. It is used informally and it means “free of charge”, “in vain”, “without success”.
Δεν πλήρωσα τον καφέ μου, ήταν τζάμπα. = I didn't pay for the coffee, it was free of charge.
Τζάμπα ανησυχούσες, όλα πήγαν καλά. = You were concerned in vain. Everything went ok.
Τζαμπατζής is a slang word in Modern Greek. It means someone who always pursues to do or get things without paying appropriately, someone who lives parasitically.