Sniffing the Biscuit

when a person performing oral sex on another from behind puts their nose in the anus

Hey hon you got some "stuff" on your nose ugh....you were clearly sniffing my biscuit.

Bro Bro you were all up in that sniffing her biscuit and what not.

Man your a dam biscuit sniffer!

Hey, Hey I jumped on that and got so in to it I started sniffing the biscuit.