disco rice
n.— «STEREOGUM: You mentioned that you learned “disco rice” is a term for maggots. Any idea how “disco rice” got its name? And why didn’t you ever name a band “disco rice”? NH: I really have no idea how maggots ended up being called disco rice.» —“Quit Your Day Job: Death Cab For Cutie” Stereogum May 20, 2008. (source: Double-Tongued Dictionary)
possibly because they look like they are dancing pieces of rice??