Needless to say my Greek friends were truly amused by my wonderings. You see, it turned out that all these lists on the Internet were more of a practical joke than something that would help the puzzled learner of Greek language understand what the young people are actually saying, 'cause believe you me - textbooks are far from teaching you the language of the street.
My disappointing experience continued with printed editions of Greek slang dictionaries. This is why I was so excited when I found about the newest slang dictionary offered and namely:
Now that my Greek is better (and my knowledge of slang developed;)) I can really appreciate this dictionary. It is actually a HELPING one for the tortured foreigner because it actually describes the language of the street in its full glory. AND!!
This is a dictionary with online presence!
The official site is: http://greekargo.googlepages.com/home
And the BLOG is http://greekargo.blogspot.com/. I sincerely recommend this blog. Every phrase is accompanied by a picture and it's great fun reading it.
A big bravo to the authors Νίκος Μακροδήμος & Χρήστος Ακριτίδης for their excellent work!