Merriam-Webster Collegiate Dictionary - snuffle

 I. verb  (~d; snuffling)  Etymology: akin to Dutch snuffelen to ~ — more at snivel  Date: circa 1600  intransitive verb  1. to snuff or sniff usually audibly and repeatedly  2. to breathe through an obstructed nose with a sniffing sound  3. to speak through or as if through the nose ; whine  transitive verb to seek or test by or as if by repeated sniffs  • ~r noun  II. noun  Date: 1717  1. plural sniffles  2. the act or sound of snuffling  3. a nasal twang