The smegma (cock cheese) of a male of Italian ethnicity. It's a play-on-words based on a combination of the words "pecker" (cock, dick) and the Italian cheese "pecorino romano".
"Wow, my boyfriend Guido had some major peckerino romano action going on his dick last night when he had me give him a blow job."
When you are ejaculating in a girl's throat after eating a pizza and she pukes cumm and pizza onto your still pulsating cock.
Rhonda was giving me an awesome blowjob, but as soon as I started cumming the bitch puked the pizza we just ate and cumm all over my dick. Wasnt expecting a peckeroni. Damn, should never feed them before throat fucking them.