patty shake
a warm handshake between two people. Initiated by one person, who extends both hands at the same time; one in the shake position, the other to be on the outside of the shake reciever (or shakee, as one might call it). This combination of hand shake and slight compression on the backside of the hand being shaken creates a shake sandwhich. It is often performed with a slight inclination of the upper body towards the shakee. Most often used by older people, and has been mastered by such presidents as George Bush, for meeting foreign ambassadors and other figures.
I went to quickly shake George Bush's hand after his speech, but he whipped out the old patty shake, and I couldn't get out.