MEANING:
Noun: high five.
DERIVED FROM:
Ylävitonen is derived from ylä– (“upper, superior, high”) + vitonen (dialectal form of viitonen – ”a five”). The phrase is is borrowed from English and literally translated from ”high five.” (This is known in linguistics as a calcque.)
Yläviitonen (with two i’) is an alternative spelling. It is grammatically more correct, but less commonly seen.
EXTRA CREDIT:
Use ylävitonen as an interjection (ylävitonen!) and it means ”give me five,” or ”slap me five.”
Finnish Word of the Day 