Finnish card-swipe 

when one applies a great helping of tooth paste to the index finger and swipes it down an ass-crack thus creating a sensation of ecstasy and tingling to the user (and often times applier). it was once used for ceremonial purposes to prevent the condition known as "dank ass", but now has devolved into a type of hygienic fetish.

fred pleased his lover, sally, by performing a Finnish card-swipe.

Finnish card-swipe by the-chronic-hygenic March 9, 2011