The Finnish Rucksack describes a vertical (standing-up) version of the traditional sex position 69 where the male participant is hanging upsidedown on his partner performing oral sex whilst receiving oral sex himself. However, for this to qualify as a Finnish Rucksack (in stead of it just being a vertical 69) the hanging man has to be pale and blond, almost resembling a large, unbaked loaf of white bread.
"Dude, I did a Finnish Rucksack on this wrestler chick I met last night. It was awesome - she had no problem carrying me..."
by Jukka Santala March 22, 2010