fob
nounUK /fɒb/
US /fɑːb/
A small thing you keep on your key ring that opens a car or a door.
She pressed the button on her key fob to unlock the car.
RELATED WORDS
OTHER MEANINGS
2. A small pocket on a pair of trousers, especially in old-fashioned clothing.
He kept his watch in his fob pocket.
3. A short chain or ribbon attached to a pocket watch.
The gold fob hung from his waistcoat.
4. To trick or cheat someone, especially in an old-fashioned way of speaking.
They tried to fob him off with a fake excuse.