According to the book Colonial Virginians and Their Maryland Relatives: A Genealogy of the Tucker Family by Norma Tucker (pub. 1994), John Tucker was a cloth worker, also called a fuller or tucker(it was also called waulking in Scotland). The fuller's job was to take the wool from the loom, soaking it in urine for up to 8 hours, after which they would soap it and work it into the fulling (or tucking) machines until it was dry and thick enough; they then washed it thoroughly in water. The thickening helped make the wool water-resistant. John's occupation was a fairly dangerous one, as the timers that drew across the cloth acted with enough violence to pull a person into the machine should any of their clothing become caught.
The workers in these mills were called fullers, tuckers and walkers, all of which became common surnames.
|A fulling mill blocker|