BOBBER
bob, bobber, cork, bobfloat
(noun) a small float usually made of cork; attached to a fishing line
Source: WordNet® 3.1
Etymology
Noun
bobber (plural bobbers)
One who takes part in apple bobbing.
(fishing) A buoyant device (frequently made of cork) attached to a line so as to suspend the end of the line with the hook (and bait or lure) above the bottom.
Synonyms: cork, float
A style of custom motorcycle with stripped-down bodywork and a shortened (or "bobbed") rear fender.
A person who rides a bobsleigh; a bobsleigher.
Source: Wiktionary
Bob"ber, n.
Definition: One who, or that which, bobs.
Source: Webster’s Unabridged Dictionary 1913 Edition