n. — Newfoundland, Food
a boiled pudding made with raisins.
Type: 2. Preservation — The term is the name for a traditional Newfoundland dish; its use is focussed in that province (see Chart 1).
The 1980 quotation refers to the pop group of that name, whose name was inspired by that dish.
The history of the term seems clearly linked to Southwestern England. OED-3 (s.v. figgy adj. (2)) lists a quotation referring to "Figgie-dowdie, a west-country pudding, made with raisins, and much in vogue at sea among the Cornish and Devon men". Given the emigration from West Country England to Newfoundland, the connection is clear, especially since DNE quotations postdate that OED-3 quotation figgy duff (s.v. figgy adj., figgy duff). See also COD-2, which marks the term "Cdn (Nfld)".
See also: fish and brewis
Images:

Chart 1: Regional Domain Search, 5 Oct. 2012