The aggressive is in vogue particularly with the youth, but the characteristic omission of the negative auxiliary has already been found in samples of dialectal Finnish recorded in the early 20th century.
[4] Häkkinen's pseudo-scientific definition describes the aggressive as a recently discovered affective negative verb mood in the Finnish language.
The verbs in Häkkinen's examples are morphologically in the indicative mood, but according to his description it is typical for the "aggressive mood" to prefix vittu ('fuck', literally 'cunt' but largely diluted owing to its high frequency especially in the vernacular of young people) as a mock bound morpheme to a pronoun that functions as the grammatical subject of the clause (vittumä sinne mene 'fuck-I there go [fuck I won't go there]') or, alternatively, to a pronoun in a locative case (vittusiellä ketään ole 'fuck-there anybody is [fuck there won't be anybody there]').
Häkkinen's joke was first published in Siulaset, the zine of the students of Finnish and Finno-Ugric languages at the University of Helsinki, and later republished in Suomen Kuvalehti (1/2000), a magazine in nationwide circulation.
Since then, the joke has been posted and reposted on various Internet forums, but often with additions that miss the original idea of a grammatical mood and focus on the use of the expletive.