"dio padella" is an Italian cuss word, similar to dio cane, dio cancro or dio maiale bastardo.
You usually might hear it when you'reamong other people and you see someone that as got his phone stolen or something bad happened to him, so in frustration he screams dio padella
"ma dio padella, un terrone mi ha rubato il mio portafoglio"
"porco dio mi hanno investito e ora ho il crociato rotto, dio padella!"