Thank you both for your help. I know slang.gr is suspect, thanks to Palαύρα's former advice. I see certain words, like γκούτου γκούτου (is it really in use as an exclamation of surprise?!), meaning the same as πω πω or «τσ-ξςςςς!...», «ατιμούτσικο...», «πονηρούλη!», «δεν μας τά 'χες πει αυτά»...