noun
A furry ball attached on top of a hat.
(British) Elasticated band used for securing hair (for instance in a ponytail), a hair tie
(informal) A pill (a ball formed on the surface of the fabric, as on laundered clothes).
(knitting) A localized set of stitches forming a raised bump.
A wobbling motion.
verb
(intransitive) To bob up and down.
(US) To make a mistake in.
(intransitive) To roll slowly.
(US, sports, transitive) To mishandle a ball.
(knitting, rare) To use the bobble stitch.