like sushi rolls, but they don't need to be fancy, people just put inside whatever they want. they're a popular food for picnics and food to bring when travelling, or as a snack. look for them in google images!
Gimbap (김밥) is a Korean dish made from cooked rice and other ingredients that are rolled in gim—dried sheets of laver seaweed —and served in bite-sized slices.( served like sushi)