a small object attached to a key ring or a watch that is used for opening doors, starting cars, etc., a chain attached to a watch for carrying it in a pocket

Formal and Informal Expressions of fob

In different contexts, you can replace 'fob' with suitable alternatives. In a more informal setting, 'key thing, key doohickey' is apt.

fob: Explore its Definition & Usage

fob Definition

1a small object attached to a key ring or a watch that is used for opening doors, starting cars, etc.
2a chain attached to a watch for carrying it in a pocket

Using fob: Examples

Take a moment to familiarize yourself with how "fob" can be used in various situations through the following examples!

Example
He used the fob to unlock the car door.
Example
She attached her keys to a fob to keep them organized.
Example
The antique pocket watch came with a gold fob chain.
Example
The hotel gave us electronic room keys on fobs.

fob Synonyms and Antonyms

Synonyms for fob

keychain
keyring
key holder

Phrases with fob

fob off
to deceive someone by telling them something that is not true
Example
He tried to fob me off with a lame excuse.
fob watch
a pocket watch attached to a chain
Example
He took out his fob watch to check the time.
fob pocket
a small pocket in trousers or waistcoats used for holding a watch
Example
He kept his fob watch in his fob pocket.

Origins of fob

originally thieves' slang, meaning 'a cheat or trick'

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Summary: fob in Brief

A 'fob' [fɒb] is a small object attached to a key ring or watch used for opening doors or starting cars. It can also refer to a chain attached to a pocket watch. The term comes from thieves' slang and originally meant 'a cheat or trick.' 'Fob off' means to deceive someone, while 'fob watch' refers to a pocket watch attached to a chain.