Ripple Shake

A firm hand shake exchanged between two individuals which. to a large extent, form a ripple motion. Usually used as a greeting or a form of hearty acknowledgement of another. Can be engaged in at the beginning of a meeting or the end of a meeting. Formalized as the Ripple Shake in early 1900s.

Girl 1: Thanks for the lunch. I know we don't usually shake hands but I recently heard of this new trend called the ripple Shake.
Girl 2: oh as in a new slurpy?
Girl 1: No i mean a proper hand in hand shake.
Girl 2: Alright let's Ripple Shake it