Rhyming slang for fag (cigarette) named after a famous jockey Harry Wragg. Archaic but still used occasionally in Dublin.
He cursed himself for the life he led, rolled himself a harry rag and put himself to bed (from a song by the Kinks).
A slang term for a cigarette, coined by the father of Ray Davies, from The Kinks.
"I roll myself a harry rag and put myself to bed."