Wiktionary
spam musubi
alt. (context Hawaii cooking English) A food made of cooked SPAM tied to a block of rice with nori, differing from sushi in that the rice is not vinegared. n. (context Hawaii cooking English) A food made of cooked SPAM tied to a block of rice with nori, differing from sushi in that the rice is not vinegared.
Wikipedia
Spam musubi
Spam musubi is a popular snack and lunch food in Hawaii composed of a slice of grilled Spam on top of a block of rice, wrapped together with nori dried seaweed in the tradition of Japanese omusubi.
Inexpensive and portable, Spam musubi are commonly found near cash registers in convenience stores all over Hawaii.