Top definition
The act of masturbating twice in a row, followed by fornicating with one person, followed by a three-some, followed by a five-some, followed by an eight-person orgy, followed by a thirteen-person orgy, etc.
That fibonasty was crazy last night. There must have been at least 144 people in my house by the end.
by leonardo_fibonacci February 02, 2015
Happy St. Patties Day!