mad, dippy, stupid, silly, eccentric not right in the head or mental. Can be either positive or negative.
1. That girl is so dappy, I tell you. But ya gotta love her She's got a lot of nerve 2 go out wiv a black bloke round ere!(good)
2. That girl is so dappy. She will never see any sense, what a totally unsuitable guy to go out with. She will pay the price for her dappiness.
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