to move jerkily down and up briefly or repeatedly verb transNAmer to fumble (a ball), e.g. in baseball [frequentative of bob1]
a small fluffy ball, e.g. of wool, used for ornament or trimming curtains with plush bobbles — H E Batesa rounded bump or lump on a surfaceNAmer a fumble in handling the ball, e.g. in baseballa bobbling movement