Definition & Meaning of "sniffer"in English

What does "sniffer" mean in body slang?

The term "sniffer" is slang for a person's nose. The structure comes from "to sniff," the action of breathing in through the nose, especially to detect smells. It is informal and often used in playful or mildly mocking expressions like "cold sniffer" or "bumped his sniffer." It typically emphasizes the nose's role in smelling rather than any formal anatomical meaning.