Yeah, I don't care for the term either.
These "choppers" being built on these shows are not choppers, they're custom builds. As the name chopper suggests the bike is a chopped version of a stock bike. Ironically, at least to me, is that these new "choppers" are bad in terms of performance, unless you're riding in a straight line. "Old School" choppers (at least in the US) were born after the second world war when US soldiers came back from the Europeon theatre and wanted better performing bikes, like the lighter Europeon bikes. So they took the heavy American bikes of the time, Indians and Harleys with big full fenders, and removed anything that was not necessary for the bike to run in an effort to drop weight. Off went front fenders, seat rails, mirrors, big headlights, turn signals, big seats, front brakes, etc. The "look" was born out of a desire for performance.
Next time someone says they want an old school look for their bike hand them a hack-saw, a six-pack of beer, a butane torch, and some cans pf spray paint. Have at it.