The word "hooter" can have a few different meanings in English, and I'll explain them all in a simple way.
Nocturnal Bird of Prey: In this sense, a "hooter" refers to a type of owl. Owls are birds that are active at night and have large eyes that help them see in the dark. They are known for their hooting sound.
Automobile Device: A "hooter" can also mean the horn of a car. This is the device that makes a loud noise to warn others, like when you are in traffic or want to get someone's attention.
Informal Term for Nose: Informally, "hooter" can be a slang term for a person's nose, especially if it is large or prominent.