What is Ass-handing?
The act (or art) of rubbing one's hand in one's asscrack for approx. 5 minutes, then using that same hand to shake hands with someone.
As a result, the person's hand will smell like ass for at least a week, and his/her friends and family will wonder if they know how to properly wipe themselves.
First seen in the movie Mallrats.
"Would you like a chocolate covered pretzel?"