bob
/bɒb//bɑb/noun
Definitions
A bobbing motion; a quick up and down movement.
Example: a bob of the head
A curtsy.
A bobber (buoyant fishing device).
Any of various hesperiid butterflies.
verb
Definitions
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, or similar medium.
Example: The ball, which we had thought lost, suddenly bobbed up out of the water.
To move (something) as though it were bobbing in water.
Example: I bobbed my head under water and saw the goldfish.
To curtsy.
To strike with a quick, light blow; to tap.