Unlike wine, for example, whisky is not really about mystification, but it does bring its own jargon. Any unusual terms you are likely to come across are described and defined in this section.
The World of Aberfeldy, Great Southern Distillery, Knockdhu Distillery, Icons of Whisky America
Sour mash whiskey
Bourbon or Tennessee whiskey made using at least 25 per cent backset; soured yeast mash; a fermentation period of at least 72 hours.