The latter is commonly known as billy blue, and is currently considered under threat, though not yet endangered.
The word hill-folk referred to people that preferred isolation from the greater society and billy meant comrade or companion.
General-purpose pot handles, often called "billy-grips", can be bought separately or may be supplied with a set of billies.
The lime residue left over from the wet lime process was one of the first true toxic wastes, a material called blue billy.
The song is a genre all to itself fusing elements of rap, country, folk, bluegrass, rock a billy, gospel, southern rock and heavy metal.
A must have disc for rock-a-billy music fans.
The presence of blue billy can give gas works waste a characteristic musty/bitter almonds or marzipan smell which is associated with cyanide gas.
The painting depicts an itinerant family; a woman with her child on her lap and a man boiling a billy for tea.
