Arnie's meatballs are a Earth culinary delicacy of ill-repute.
According to Norman, an oracle of humorously grave disposition, he reproached these "meatballs" as obstructing the digestive tracts of humans. These meatballs are the labor of love of a human named Arnie.
Coupled with the "romantic malnutrition" of Mildred, those between these two dangers will have the "night of their life".
The personification of these meatballs is a human baseball player named Vida Blue, who exerts a similar influence during his time with the San Francisco Giants baseball team (The Night the Cylons Landed, Part I).