I was given this definition by the engineering staff at Blackpool Transport Tramway department when I researched and wrote Blackpool Coronation Cars in 1990. ISBN 0950940577. Def:- you cannot use that tram it is demic.

That car of yours is demic - it's always breaking down.

pete: "yo, how did u do on your report card?"
johnny: "terrible, i failed all of my demics"