Dressed in very old, torn clothes.
Like Cinderella, the girl in rags was swept off her feet by a handsome Prince Charming.
(by extension) Very poor or lowly.
Source: en.wiktionary.orgThe man forget not, though in rags he lies, And know the mortal through a crown's disguise. Mark Akenside
The City of New York is like an enormous citadel, a modern Carcassonne. Walking between the magnificent skyscrapers one feels the presence on the fringe of a howling, raging mob, a mob with empty bellies, a mob unshaven and in rags. Henry Miller
You neither can nor should understand what it means. Listen, it comes without guitar, Neither in rags nor in any purple fashion. And there is nothing in it to comfort you. Donald Justice
He whose clothes are too fine, shall go about in rags. Mauritania Proverb
He who wears too fine clothes, shall go about in rags. Mauritania Proverb
Lice flourish in rags. Kashmir Proverb