I actually think that this might be something that Italians might say when they grow impatient with the slowness of a job, given that things seem to run on a slower clock in Italy, especially Southern Italy.
I hear the word "mese" voiced with a "z" sound, as in "meze". Is this the correct pronunciation? If so, is it the norm that an "s" sandwiched by vowels will be sounded as a "z"? I think that this is similar to French and Spanish pronunciation, if I'm not mistaken.