I saw something "Biluo" that seemed to be very common in ancient times from a folk online. What is it?

舵舵:

b? luó

1. Name of food. Originally refers to pilaf, later also refers to cakes.

Crab gizzard:

xiè b? luó

1. Crab meat and crab roe are stuffed in crab shells and coated with flour to make food. Also known as hibiscus crab, common name crab box.