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Urban Dictionary: Twilve: The English language is lacking a word that defines 24 hours, like e.g. the Scandinavian languages have. There's «day» that can define a 24-hour span, but that can also be used to define the 12 hours of light, as opposed to «night».
«Twilve» is a contraction of the words two/twi and twelve, defining a period of time that is two times twelve hours.
«Twilve» is both a noun, as in 24 hours, and a verb, meaning «stay up for 24 hours».
(Andreas and Merete have both coined the word and authored the definition of twilve. Read more about it in this Norwegian blog post.)