Real Dictionary

bobble
countable noun: A bobble is a small ball of material, usually made of wool, which is used for decorating clothes.

bobble in American English
a bobbing, up-and-down movement
to deal with awkwardly or unskillfully; specif., to make a bobble with (a ball)
to move jerkily; bob
noun: a repeated, jerky movement; bob
transitive verb: to juggle or fumble (a batted or thrown ball) momentarily, usually resulting in an error

bobble in British English
noun: a short jerky motion, as of a cork floating on disturbed water; bobbing movement
verb: (of a ball) to bounce with a rapid erratic motion due to an uneven playing surface