Today's Parola del Giorno is the interjection, Su!, which means Come on!  

See the word used below:

Mio padre si lamentava del fatto che la bolletta del gas fosse troppo alta.  “Su!” dissi, “È normale durante i mesi invernali!"

My dad was complaining about the fact that the gas bill was perhaps too high.  "Come on!" I said, "It is normal during the winter months!"