1. to hit lightly and quickly; tap.
2. to cause to move up and down: bobbed my head in response to the question.
3. to move up and down: a cork bobbing on the water.
4. to grab at floating or hanging objects with the teeth: bobbed for apples.
5. to curtsy or bow.
6. A tap or light blow.
7. A quick, jerky movement of the head or body.
8. bob up to appear or arise unexpectedly or suddenly.
9. A small, knoblike pendent object, such as a plumb bob.
10. A fishing float or cork.
11. A small lock or curl of hair.
12. A woman's or child's short haircut.
13. informal surgical shortening or reshaping of the nose.
14. the docked tail of a horse.
15. A bobsled.
16. A bob skate.
17. to fish with a bob.
18. to cut short or reshape: bobbed her hair; had his nose bobbed.
19. chiefly british A shilling.

1. to move gently and vertically, in either a single motion or repeatedly up and down, at or near the surface of a body of water.
2. to move (something) as though it were bobbing in water.
3. to curtsy.
4. A bobbing motion.
5. A bobber.
6. A curtsy.
7. A bob haircut.
8. any round object attached loosely to a flexible line, a rod, a body part etc., so that it may swing when hanging from it
9. the dangling mass of a pendulum or plumb line.
10. the docked tail of a horse.
11. A short line ending a stanza of a poem.
12. the short runner of a sled.
13. to cut (hair) into a bob haircut.
14. to shorten by cutting; to dock; to crop
15. short form of bobsleigh
16. A shilling.
17. A 10-cent coin.
18. an unspecified amount of money.
19. abbreviation of shishkabob.
20. A graphical element, resembling a hardware sprite, that can be blitted around the screen in large numbers.