jigger

1 :  a measure used in mixing drinks that usually holds 1 to 2 ounces (30 to 60 milliliters)

2 :  one that jigs or operates a jig

3 :  any of several sails

4 :  jig 3a

5a (1) :  a mechanical device usually with a jerky reciprocating motion (2) :  a mold or a machine incorporating a revolving mold on which ceramic items (such as plates) are formedb :  gadget, doodad