Definition of "Bob" :

noun: a short abrupt inclination (as of the head)

"He gave me a short bob of acknowledgement."

noun: a short or shortened tail of certain animals

noun: a small float usually made of cork; attached to a fishing line

noun: a hanging weight, especially a metal ball on a string

noun: a long racing sled (for 2 or more people) with a steering mechanism

noun: a hair style for women and children; a short haircut all around

noun: a former monetary unit in Great Britain

verb: cut hair in the style of a bob

"Bernice bobs her hair these days!."

verb: make a curtsy; usually done only by girls and women; as a sign of respect

verb: remove or shorten the tail of an animal

verb: move up and down repeatedly

"Her rucksack bobbed gently on her back."

verb: ride a bobsled

"The boys bobbed down the hill screaming with pleasure."