Singing greek with Mariza Koch's songs

The couplet of the song is written in third person singular describing Scrooge's behavior, while the refrain is in second person singular as it addresses Scrooge in an imperative and critical tone. The pupils, in groups, can write more songs following this structure for different characters.
Idioms: "δεν δίνει ούτε τ' αγγέλου του νερό" (den dinei oute t'angelou tou nero = avarice is the only passion that never ages), "κιτρίνισε σαν φλουρί" (kitrinise san phlouri = to get red as a beet), "ο κόσμος βγήκε στο σφυρί" (o kosmos vgēke sto sphyri = people are up for grabs): explain the meaning of each phrase and how they are used in the Greek language.