• Anything that hangs so as to play loosely, or with a short abrupt motion, as at the end of a string; a pendant; as, the bob at the end of a kite's tail. • A knot of worms, or of rags, on a string, used in angling, as for eels; formerly, a worm suitable for bait. • A small piece of cork or light wood attached to a fishing line to show when a fish is biting; a float. • The ball or heavy part of a pendulum; also, the ball or weight at the end of a plumb line. • A small wheel, made of leather, with rounded edges, used in polishing spoons, etc. • A short, jerking motion; act of bobbing; as, a bob of the head. • A working beam. • A knot or short curl of hair; also, a bob wig. • A peculiar mode of ringing changes on bells. • The refrain of a song. • A blow; a shake or jog; a rap, as with the fist. • A jeer or flout; a sharp jest or taunt; a trick. • A shilling. • To cause to move in a short, jerking manner; to move (a thing) with a bob. • To strike with a quick, light blow; to tap. • To cheat; to gain by fraud or cheating; to filch. • To mock or delude; to cheat. • To cut short; as, to bob the hair, or a horse's tail. • To have a short, jerking motion; to play to and fro, or up and down; to play loosely against anything. • To angle with a bob. See Bob, n., 2 & 3.