What does "pepperoni" mean?

A spicy salami-style Italian-American sausage made from cured pork and beef seasoned with pepper.

How do you pronounce "pepperoni"?

Pronounced //pɛpəˈɹəʊni//.

Common synonyms include: cured sausage, meaty, pepperoni discs, pepperoni rounds, pepperoni slices, pepperoni-based.

/pɛpəˈɹəʊni/ noun

noun ·Uncommon ·Advanced level

Noun

1
A spicy salami-style Italian-American sausage made from cured pork and beef seasoned with pepper. countable, uncountable
"He gave the dog a treat — a dried up skinny, turdy looking, pepperoni sausage."
2
a pork and beef sausage (or a thin slice of this sausage) wordnet
3
Pizza with only tomato sauce, cheese and pepperoni toppings. countable, uncountable
"Yo, Tony, gimme a slice of pepperoni and a coke."

"I don't understand why pepperoni pizza is so popular."

Borrowed from Italian peperoni (“bell peppers”), the plural of peperone (“bell pepper”).