wobbler

plural wobblers

1. One who or that which wobbles.
2. A person who remains undecided, and may ultimately align with either position.

   Towns fell to him like so many houses of cards; and the fall of each town represented not only an accession to the prestige of the Royalist commander but a physical accession of strength as the wobblers flocked to the successful army.

   2005, Alfred H. Burne, The Battlefields of England

3. ball gamesA stone that rocks from side to side as it travels because it is not resting on its running surface.
4. colloquiallawA case with an indeterminate outcome, contingent upon factors beyond the parties' control.
5. colloquiallawA 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.
6. fishingA fishing lure made to resemble a prey fish and that wobbles in the water; plug, minnow.
7. CommonwealthIrelandUKslangA sudden unexpected outburst of anger or rage; a tantrum.

   Synonyms: hissy fit, wobbly, tantrum

8. IrelandUKderogatoryslangIslamA Salafi.
9. advertisingA small publicity notice which appears to float at eye level, being attached to a fixture by a flexible arm.

   A wire "Wobbler" holds a card for counter display

   1958 May 19, “Irish offers sales kit”, in Billboard, page 18

   1 more example

   Yesterday saw the launch of the initiative, which will use advertising “shelf wobblers” that usually publicise special offers to encourage Bristol shoppers to bring back their plastic bottles for recycling.

   2006 February 28, “Recycling message hits supermarket shelves in Bristol”, in LetsRecycle.com

10. The end of the roll in a roller mill for shaping steel.
11. A boiled leg of mutton.