Green’s Dictionary of Slang

jeng-jeng n.

[Carib.E. jege, rags, tatters + ? Ngombe jengé, disorder]
(W.I., Jam./Bel.)

1. anything considered worthless, a useless collection of bits and bobs.

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[UK]A. Bennett God the Stonebreaker 6: They put the woman’s few jeng-jeng outside and moved the ’ouse on rollers.

2. of things or of personal appearance, a general state of confusion.

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[WI]L. Bennett Auntie Roachy Sey (2003) 47: Before me tief, me wear jeng-jeng.