When Italians are annoyed, the Italians will often say "Uffa!", and Accidenti!.
Italians may also use stronger phrases when they are annoyed like "Che palle!", (What a Pain) and some other more vulgar sayings that Italians may use when annoyed are "Ma che cazzo!", which means "What the "f**ck.
Italians can also convey their annoyance by directly telling someone to "Smettila!" which means to stop it or even "Lasciami in pace" "Leave me alone!".
Italians will often say "OMG" as "Oh mio Dio!".
Some Italians may say OMG as "Dio Mio!".
Oh mio Dio and Dio Mio in Italian mean "Oh my God!", or "My God!".
The more condensed and common exclamation for "OMG" in Italian is "Oddio!".
Other Italian related phrases for "OMG are Mamma mia, which expresses a range of emotions that are similar to "Oh my God", and in Italian, "Madonna!" is used for showing surprise or amazement.