Meaning of jigger

jig•ger

1. a person or thing that jigs.
1. the lowermost sail set on a jiggermast.
2. jiggermast.
3. a light tackle, as a gun tackle.
3. any of various mechanical devices, many of which have a jerky or jolting motion.
4. some contrivance, article, or part that one cannot or does not name more precisely: What is that little jigger on the pistol?
5. a machine for forming plates or the like in a plaster mold rotating beneath a template.
6. a jig for separating ore.
7. a jig for fishing.
8. a club with an iron head intermediate between a mashie and a midiron, now rarely used.
9. a bridge.
1. a 112-oz. (45-ml) measure used in cocktail recipes.
2. a small whiskey glass holding 112 oz. (45 ml).

jig•ger

1. Also calledchigoe.
2. chigger.

jig•ger

1. to interfere with.
2. to manipulate or alter, esp. in order to get something done illegally or unethically: to jigger company records to conceal a loss.