Step Printing is a technique that was popularized by Wong Kar Wai where you capture the scene with a low frame rate and then slow it down in post production. This creates an image that is played back in regular motion, but with blurring on any action.

Examples

Wong Kar Wai - Examples from his films

Demonstration Video - Demonstrating Step Printing from 12 FPS - 3 FPS utilizing both 180 degree and 360 degree shutter angles. This video is good to see how subtle the effect can be made as well as how extreme you can go with it.