In reply to Burrito:
Once motocross bikes and enduro bikes were invented, real scramblers were no longer needed, so this might be trivial, but I think your first call of street tracker was closer.
It gets tricky with customs these days, so let's see if I have this right, and correct me if I am wrong:
Scrambler=street bike with knobby tires, high pipes, and rise bars. Obviously way, way cooler than those old-news cafe racers, at least for another couple months.
Bobber=Cut off most of the seat and mount as low as possible, cut most/all of the rear fender off and remove most/all of the rear suspension travel. Timeless. Hope you don't accelerate too hard or hit a bump! 
Cafe racer=take off the front fender, throw away the airbox and side covers, hide the battery, and add clip-ons. Small-ish seat. Small tailsection, often rounded.
Bonus points for sideways license plate on the swingarm on either of the above.
Street tracker=take off the front fender, put on slight rise bars with some sweep, treaded tires, long-ish seat. Small, high-ish tail section, often square.
Streetfighter=what a cheapskate squid/stunter sportbike becomes when still running after a crash. Optional flat black rattle can and rise bars. Mandatory eBay-sourced "headlight."
In case anyone hasn't checked asking prices lately, all of the above are worth way, way more than a stock low miles creampuff when selling on craigslist, because custom.
Hotlink:
Parking lot at Wally World this morning
