A small alcoholic drink - usually whisky - that one drinks from a hip flask or a glass when copious amounts of alcohol are not available, such as in the countryside.
"It´s a devil of a long way to the next hostelry old chap - fancy a quick snifter?"
Normally an elegant glass for drinking Brandy but also a verb for the 'taint lover' in all of us.
Bob, you know that hot chick Heather? I fucked her all night and she forgot her panties when she left. I wore them on my head at home all day and 'snifter'