Green’s Dictionary of Slang

1. (W.I.) crude, coarse, uncouth manners; also as adj.

1986		R. Hewitt White Talk Black Talk 108: If you meet an older (black person) who looks a bit cruff (scruff) [...] then you just break into the Jamaican habit – patois.
2001		(con. 1981) A. Wheatle East of Acre Lane 96: Dey can’t afford to go barber saloon an’ get dem head trim. I ain’t moving wid no cruff.

2. (also cruffbag) a crude, uncouth person.

1953		W.G. Ogilvie Cactus Village 33: You grudge me the one goat that I have, you wo’thless low-minded cruff!
1986		R. Hewitt White Talk Black Talk 129: cruff – a scruffy person. [Ibid.] 130: ‘cruffbag’, where ‘cruff’ provided the Jamaican insult, and ‘bag’ indicated in English the gender of the recipient of the insult.
2001		(con. 1981) A. Wheatle East of Acre Lane 236: Dat cruff who’s always following Crucial Rocker sound in his one shirt dat he wears everywhere.