Wolfstar en · PROPN
Etymology
From wolf + star: Remus Lupin is a werewolf; and Sirius Black is named after the dog star Sirius (Sirius Black is an animagus who turns into a dog).
Meanings
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(slang) The ship of characters Remus Lupin and Sirius Black of the Harry Potter series.
Remus’ lycanthropy almost always features in Wolfstar fics precisely because it is his lycanthropy that brands his sexuality as disallowable.
2016, Jaquelin Elliott, “Becoming The Monster: Queer Monstrosity and the Reclamation of the Werewolf in Slash Fandom”, in Revenant, number 2, page 99:The continued enthusiasm demonstrated here alludes to the power SBP has within HP fandom: as Emmie describes it, SBP is “the cornerstone of the Wolfstar fandom” (“Shoebox Project”).
2018, Kasandra Arthur, "We Are Having All Kinds of Fun: Fluidity in Shoebox Project", thesis submitted to the University of Waterloo, page 142Silveredglass, a reader and writer who primarily ships Drarry and Remus Lupin/Sirius Black or 'Wolfstar', found Harry Potter fandom through Tumblr.
2018, Emily E. Roach, “Polyjuice and Potterheads: The Changing Face of Fandom from LiveJournal to Tumblr”, in Fan Phenomena: Harry Potter, unnumbered page: