An action. Also known as a "beana". To quickly run your finger, or other objects, through someone's butt crack, while exclaiming "QUABEANA!". Not a sexual gesture.

Different variations include changing the location of the "beana" (I.E. Quabeana-ing someone in the kitchen might also be called a "Kitchen-beana!")

Or changing the beana'd body part (I.E. Running your finger through someone's cleavage may also be called a Boob-crack-beana!)

When you eat dirt for the first time and leave your family to build a shack in the woods