There you go. That's what I mean.
Didn't you ever watch Beverly Hillbillies? Dr. Granny was going to bob Mr. Drysdale's tongue because it kept getting in his way while he was talking. That's removing what's not necessary.
Here's a chopper.
You got your pan head. You got your knucklehead. Might even have a flathead. Maybe an Indian. Could be a brit bike. Triumph, BSA, etc. No Hondas, Yamahas, Kawasakis allowed. At least until the late 60s. Before the 50s, they were just about all hardtails. Various types of front ends. Springers, girders, and then along came the nearly modern forks. You didn't go to any catalog and order a chopper. Whole or in parts. Most if not all this was done in your garage by you and maybe some like-minded friends. People actually did this themselves. They didn't buy it done.
You take your bike and strip it to the frame. You cut the front downtubes somewhere just below the neck. Stick a long pipe in the neck and with a little heat, you pull up on the pipe until you reach a predetermined angle. It could be going from a 30° angle to a 40° angle. Hope you had a plan. Once set, you weld in some tubing to fill the gap in the downtubes. If you did have a plan when you started, you would know that you need 16" over forks or 20" over or 8" over, whatever. Mild to wild. That gives the bike a normal riding stance. Handling is completely different than before because all that rake and trail has gone out the window. And it wasn't just putting 4", 6" or 8" over forks on a stock bike. They're pretty funky handling too. But for different reasons. That's just a stock bike with over stock fork tubes.
That's where chopper came from.
You can call them whatever you want. Only Dems want to send people to jail for calling something by the wrong name.