1) A slang from the 50's denoting a pervert (most always male) who likes to sniff farts or ass. The snarf will often seek out and sniff the chair/cushion or bicycle seat of someone in the hopes that they will be able to smell a trace of ass lingering from the person who last used it.
2) Sexual arousal from the smell of ass or pussy.
That perverted snarf was hanging around the school yard sniffing bicycle seats again.
Bill got an erection from the smell of dirt ass down at the nursing home.
He loves the smell of shit gas! what a fucking snarf!
Snarf was Lion-O's "nursemaid" on Thundera, and he has a hard time dealing with the fact that Lion-O is no longer in need of his "protection". Although he's somewhat cowardly, Snarf does manage to gather his wits and help when needed.
Snarf, where is my bed pan? i'm going to piss the bed soon