It got its name from the finely cut strands appearing like 'shag' fabric and was originally considered poor quality.
These were imported to the United Kingdom by Rory Innes following the Virginia tobacco plantations in North America.
The flat bags in which shag is typically packaged for commercial sale are often called tobacco pouches.
Oppositely, pre-processed and packaged cigarettes may be referred to colloquially as tailor-mades, tailies, tailors or straights.
In the British sitcom Only Fools and Horses the character Uncle Albert claims to smoke his own recipe of "Navy shag and Dutch tobacco".