The motion of something that bobs.
A wobbling motion.
A pill (a ball formed on the surface of the fabric, as on laundered clothes).
A localized set of stitches forming a raised bump.
A furry ball attached on top of a hat.
Elasticated band used for securing hair (for instance in a ponytail), a hair tie
To bob up and down.
To make a mistake in.
To roll slowly.