Malt whisky is whisky that is made from a fermented mash produced primarily from a malted grain. Unless otherwise specified, it is generally assumed that the primary grain is barley, although whisky is also made using malted rye. A whisky made from malted rye is usually called a "rye malt whisky" instead of a "malt whisky".

If the product is made exclusively from a single grain at a single distillery (and various other restrictions apply), it is called a single malt whisky.

The exact definition of a "malt whisky" and a "single malt whisky" and the restrictions governing its production vary according to the regulations governing the marketing of whisky in the local jurisdiction.

In the United States Code of Federal Regulations, the Standards of Identity for Distilled Spirits define a "malt whisky" as a whisky produced at an alcohol by volume (abv) level not exceeding 80% from a fermented mash of not less than 51% malted barley grain and stored for aging in charred new oak containers at not less than 62.5% abv. The regulations define a "rye malt whisky" in a corresponding manner using rye grain. If such a whisky has been aged for at least two years, contains no added coloring and flavoring, and has not been blended with neutral spirits or other types of whisky, the additional adjective "straight" can be applied, as in "straight malt whisky" and "straight rye malt whisky". If the whisky is not completely "straight" but at least 51% of its content is "straight malt whisky", the word "malt" can still be used, but the product must be described as a "blend", as in "blended malt whisky" or "malt whiskey – a blend".

Paul John (born 25 January 1970 in Pontypridd) is a former Wales international rugby union player with 10 caps. A scrum-half, he played his club rugby for Pontypridd RFC, where he was captain.

He retired as a player in 2005 and was, until 2010, Head Coach at Pontypridd. He is currently Assistant Coach of the Club. He is also Head Coach of the Wales Sevens team who won the 2009 Rugby World Cup Sevens.

Paul was a teacher of Physical Education (P.E.) at Bryn Celynnog Comprehensive School, before becoming a full-time coach within the Wales National Academy setup.