“He fell out of an elephant's nose.”

Stuck-up; thinks he's better than everyone else.

Heard in the wild

یه سلام هم نمی‌کنه، انگار از دماغ فیل افتاده!

He won't even say hello. Who does he think he is?

More people and manners

دستت درد نکنه
dastet dard nakone
“May your hand not hurt.”
Thank you, for a meal, a favour or any effort someone has made for you.
خسته نباشید
khaste nabâshid
“May you not be tired.”
A greeting that acknowledges someone's work, said to shopkeepers, teachers or anyone at the end of an effort, whether or not they look tired.
قابل نداره
ghâbel nadâre
“It isn't worthy of you.”
Classic taarof: a shopkeeper or host politely waves away payment or thanks, and you are expected to insist.
به روی چشم
be ru-ye cheshm
“On my eyes.”
Gladly, consider it done. Even a simple cheshm, "eye", means "yes, will do".