1. headcanon - Noun
2. headcanon - Verb
headcanon (countable and uncountable, plural headcanons)
(fandom slang) Elements and interpretations of a fictional universe accepted by an individual or small group of fans, but not necessarily found within or supported by the official canon.
In my own headcanon of Rocky IV, Ivan Drago is a Russian Mafia enforcer instead of a Red Army Captain.
headcanon (third-person singular simple present headcanons, present participle headcanoning, simple past and past participle headcanoned)
(fandom slang) To interpret in the form of a headcanon.
I headcanon her as gay.
I see it usually in the context of “esk*mo kisses” which may pop up when people talk about their ships and their headcanon, but it means “snow eaters” in cree and is a slur against Inuit people so please just don’t use it! Source: Internet
My favorite Ragnarok headcanon is that the entire movie is a story Thor is telling the audience. Source: Internet
Newt Scamander in the Fantastic Beasts movies is one of my favorite characters for that reason- although I sadly think that JKR and the crew would probably never have intentionally done it, I'm still taking my headcanon and running with it. Source: Internet
I haven’t seen a single Peter/Shuri friendship headcanon in which Peter is dragged. Source: Internet