When prefixed with "L", the word adytum, which defines the innermost sanctuary of an ancient Greek temple, refers to a vagina.
Originating as a joke featured in the TV series, Broad City, and referencing multiple scenes from the film, Black Swan, to Black-Swan someone is to stealthily approach an unsuspecting victim, esp. an acquaintance, from behind, wait silently from a short distance for the target to turn around, and to opportunistically startle them by standing motionless and displaying a batshit-intense, emotionless, I-watch-you-while-you-sleep, and unblinking stare.
I was minding my own business, finishing up at work, looking for a document I needed to work on at home that weekend, when my BFFL, suddenly at my place of business and looking deeply into my eyes, Black-Swanned me so badly I screamed and possibly farted.
Originally a search engine abbreviation to query the website Urban Dictionary, “urdict”, a play on the word, edict, denotes any term that has gained sufficient everyday social currency to merit inclusion in the official English language canon, despite it’s technically unofficial linguistic status. In other words, its degree of usage is such that — as an edict of sorts — it’s colloquial legitimacy and cultural significance cannot be refuted.
Everyone is using 'lol' now, and I know it's not in the dictionary, but we all know what it means and use it in conversation everyday: it's an unquestionable urdict.