—n. 1. a repeated, jerky movement; bob.
2. a momentary fumbling or juggling of a batted or thrown baseball.
3. an error; mistake.
4. a small ball of fabric usually used decoratively, as in a fringe or other trimming: a sweater with a line of bobbles up the sleeves.
—v.t. to juggle or fumble (a batted or thrown baseball) momentarily, usually resulting in an error.