Top Definition
The monthly masturbational session most males will have that is in some way more special than the other 29, a more pleasant version of the process females will endure,menstruation.
Dave: Hey John, why didn't you come out last night ?
John: Oh sorry it was my time off the month, I rented the new girls gone wild, lubed up....
Dave: Oh, wankstruation !
by BFS_YEAR4 September 07, 2009
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