One who sniffs the gussets of used underwear. The sniffing action may take the form of someone putting their nose into what they,'mistakenly', thought was a hankerchief. Or for the hardcore plamph the underwear may be worn on the head. This type of person will breathe in so hard that the underwear will be sucked ito the mouth,therefore maximising the fishy stink, plop smell or wee wee odour.
Sniff Sniff - breathe in - smell maximisation - spurt