knocker
🇺🇸
/ˈnɑːkər/
🇬🇧
/ˈnɒkə(r)/
A device on a door that you use to make a sound to let people inside know you want to enter.
I heard the knocker on the door and went to see who was there.
A person who often criticizes others or things, often in a negative way.
He's known as a knocker, always finding fault with everything.
Informal term for a woman's breasts.
This is a bit inappropriate, but did you see the size of her knockers?