Definition of "bobble"

bobble

/ˈbɒbəl/

noun
plural bobbles
1. A furry ball attached on top of a hat.
2. (Britain) Elasticated band used for securing hair (for instance in a ponytail), a hair tie
3. (informal) A pill (a ball formed on the surface of the fabric, as on laundered clothes).
4. (knitting) A localized set of stitches forming a raised bump.
  Quotations
  From the top the sample shows four stitch popcorns, five stitch bobbles, two rows of bells and a central leaf with leaves sloping to the left and right each side.
  2008, Claire Compton, Sue Whiting, The Knitting and Crochet Bible, page 45
5. A wobbling motion.
  Quotations
  My favourite dubious history of the head bobble was put forward by an Indian management consultant […]
  2013, Elizabeth Chatterjee, Delhi: Mostly Harmless: One woman’s vision of the city
verb
third-person singular simple present bobbles, present participle bobbling, simple past and past participle bobbled
1. (intransitive) To bob up and down.
2. (US) To make a mistake in.
3. (intransitive) To roll slowly.
  Quotations
  A neat interchange between Mikel Arteta and Wilshere set up Podolski and his finish bobbled into the net via Gallas.
  November 17 2012, BBC Sport: Arsenal 5-2 Tottenham
4. (US, sports, transitive) To mishandle a ball.