0 present participle of jigger --
1 to change something, especially unfairly or illegally: --
Jiggering is used only in the production of flat wares, such as plates, but a similar operation, "jolleying", is used in the production of hollow-wares such as cups.
Jiggering and jolleying have been used in the production of pottery since at least the 18th century.
In large-scale factory production, jiggering and jolleying are usually automated, which allows the operations to be carried out by semi-skilled labour.
The cakes are processed through a pug to remove air, before being shaped by jiggering or jolleying to produce plates and bowls.
This treatment, called jiggering is a time honored method of producing many pots that are identical.
We cannot always be jiggering the £ about every 12 months or so.
What is the good of all this jiggering about?