whiffer sniffer 

a guy that goes around sniffing girl's bicycle seats in rainy weather

"I saw that guy in the parking lot. He's a whiffer sniffer allright!"

whiffer sniffer by joe mcduffie July 6, 2007

wiffer sniffer 

a person (often a pre-teen male) who farts in a bathtub so that they might bite the bubble it produces.

John, a legendary wiffer sniffer, leaned back in the bathtub with well-practiced ease and farted, then just as quickly, leaned forward again and bit the bubble.

wiffer sniffer by danton June 20, 2006

a young wiffer sniffer 

A young person.
A word that I believe that older people use.

Aww look at those cute 10 year olds reminds me of when I was a young wiffer sniffer!

a young wiffer sniffer by JacksonWang852g7 November 20, 2019