Meaning
Attractive, excellent, or top-quality — of a good-looking person ('she peng'), or first-rate goods, especially high-grade herb. A 'peng ting' is something (or someone) fine. Modern UK-Jamaican slang, spread from the reggae diaspora into wider youth speech.
Examples
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Dat gyal peng, eeh?
That girl is gorgeous, isn't she?
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Di herb peng, real high grade.
The herb is top-quality, real high grade.
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Him a wear a peng ting.
He's wearing a fine (stylish) outfit.
Origin
Modern UK-Jamaican slang (of uncertain origin) for attractive/excellent; widespread among youth via the reggae/road-culture diaspora.
How it’s used
Attractive/top-quality ('peng ting'). Modern slang. Compare 'criss', 'fresh', 'high grade'.