An onionroll is a silly little guy that rolls on the floor. They roll from side to side until they hit a wall and roll the other direction or roll off a ledge and die (sadly). They sometimes like rolling around. You may see them cause a rolling chain reaction by rolling on stuff.
They are a silly little rolling onion. They are too dumb to walk so they just roll. Interestingly, they share many similar characteristics to young Common Onions before they learn to walk.
They don't have a care in the world. They just roll indefinetely. They are a pain to animate everywhere outside of gameplay since they roll.