Fig. [of an idea or proposal] on an unstable or questionable foundation; [of an idea or proposal] founded on a risky premise. When you suggest that we are to blame, you are on shaky ground. There is no evidence that we are at fault.The case for relying solely on nuclear energy seems to be on dangerous ground.
n. a camera, used mainly in advertisements and documentaries, that is shaken and moved constantly to create a sense of excitement, urgency, or crisis. We can’t afford much in the way of costumes for the sequence, so we will use the shaky-cam and shoot it in dim light.