wobbler

noun

1. 1.One who or that which wobbles.
2. 2.A stone that rocks from side to side as it travels because it is not resting on its running surface.
3. 3.A case that could go either way depending on factors that cannot be controlled.
4. 4.A class of crime that can be charged as a lower penalty or a higher penalty, e.g. a crime punishable as either a misdemeanor or a felony at the discretion of the prosecutor.
5. 5.A fishing lure made to resemble a prey fish and that wobbles in the water; plug, minnow.