snuffle
v.
1580s, from Dutch or Flemish snuffelen "to sniff about, pry," related to Dutch and Flemish snuffen "to sniff" (see snuff, v.2). Related: Snuffled; snuffling.
n.
1764, "sound made by snuffling," from snuffle, v.. Old English had snofl (n.) "phlegm, mucus." The snuffles "troublesome mucous discharge from the nostrils" is from 1770.