The traditional greeting of perverted native Idaho people performed by sticking a finger or thumb up another persons anus instead of shaking hands. This usually comes before even kissing or the common juvenile sexual definitions of first, second, and third base.
by -Brother Dave December 4, 2007
The act of putting your finger inside of another persons anus before engaging in any other physical intimate contact (including kissing) with that person.
by sk355x December 10, 2007