Modified Elevator Shimmy 

Alternating up-and-down hand motions on the back of another person in a face-to-face romantic encounter. While one hand moves upwards the other hand moves downwards, unlike the elevator shimmy, where both hands caress up or down at the same time.

Eric: Hey man, any luck tonight?

Mike: Just a modified elevator shimmy.

Modified Elevator Shimmy by Miguel Commotion November 24, 2009