bobble

noun

1. a bobbing, up-and-down movement
2. any of the tufted balls forming a decorative fringe, as on curtains
3. ☆ Informal
   1. an awkward mistake; error
   2. Sports an awkward juggling of the ball in trying to catch or hold on to it

intransitive verb bobbled, bobbling

1. to move jerkily; bob
2. ☆ Informal to make an error

transitive verb