0 used to describe threads that are thicker in some parts than in others, giving an uneven surface, or cloth made of threads like this:
If a weaving yarn is thick and slubby, consider weaving it only every third row.
Cloth produced by intertwining rows of loops from a single strand is slubby and bumpy, especially on handmade items.
I've got the trousers in moleskin, corduroy, slubby linen and canvas.
