Green’s Dictionary of Slang

(W.I.) ragged, worn-out, usu. of clothes.

1957		F.G. Cassidy ‘Iteration as a Word-forming Device in Jam. Folk Speech’ in AS XXXII:1 52: Ragga-ragga, covered with rags, very ragged.
1958		in Cassidy & LePage Dict. Jam. Eng. (1980) 373/1: raga-raga.
1999		Douglas & Diehl Madam Fate 18: Picture this: me, stealing out cross the guinea grass in my ragga-ragga dress.
2000		N. Hopkinson Whispers from the Cotton Tree Root 19: [...] with a ragga-ragga dress and bare foot.