A seller might be tempted to classify a significantly worse “crash” as a “drop” in order not to scare off buyers.
As others have said “dropping” in the vernacular typically refers to a zero to low speed “oops” with typically minimal and mainly cosmetic damage to the machine…typically the rider suffers no injury at all. Such cosmetic damage can be depressingly expensive to fix…so it often gets left.
Typical “not worth fixing” items would be: Abrasions or mildly bent clutch and brake levers. Scratched/chipped paint. hole in end of bar grip. Mildly cracked body work. cracked mirror. Turn signal stalks and lenses are pretty voulnerable to “hanger rash” so may not necissarly indicate the bike has been dropped. Hanger rash= damage resulting from parking in too tight an area. e.g. Squeezing a bike into a two car garage which already contains two cars, a snowmobile, and another motorcycle.
With training and practice, a bike can be ridden with near zero speed with both feet on the pegs. Lacking practice, a new rider tries to “paddle” the bike around with thier feet. Beyond a certain point they will not have the strength or leverage to keep the bike from falling over. Or they step on a patch of sand or pea gravel, or a pot hole. Or release the clutch when they “thought” they were in neutral. That is a “drop”.
At speed, a motorcycle “wants” to stay upright. Handling a motorcycle well at very low speed/tight quarters, requires a fairly delicate balance of throttle, clutch, brakes, steering, body english, and just plain balance. Rider instruction courses can teach the basics in a short time. Worth doing as many of the techniques are far from obvious, and the courses are tought on light, easy handling machines that somebody else gets to fix if you screw up. After the course, you’ll know what to do, but practice is required to hone reflexes, and of course to learn the idosycrasies of YOUR machine.
Regarding leathers: There are now viable textile alternatives that can be cooler to wear in hot weather, or water proof for rain, etc. Some of these should be considered “sacrificial”…only good for one crash, but offering decent protection when needed. I’ve witnessed a couple of crashes where this stuff worked as advertised, and don’t see how anything but full racing leathers would have been better.
Heavy “racing” grade leathers are probably a bit better, and tend to survive multiple crashes. They are also hotter than hades. Many light weight leather garmets worn by “bikers” are simply wind and bug resistant fashion statements…a leather vest is little more than a place to sew patches, chaps will stop the wind, but leave hips exposed to road rash, and lacking any exta padding/armor in the knees won’t do much there either.
Regarding crashing: Do anything and everything to avoid it. Your brain, non-impared, and fully focused on riding and threats from other drivers is your most important piece of safety equiptment. Then you need to accept that there is a significantly non-zero probability that you will crash anyway. Wear helmet and other gear EVERY time you ride, so that when the odds catch up to you will be wearing it. The gear doesn’t make you “safe”. Nothing makes you “safe”. If you can’t come to terms with that concept, don’t ride…and don’t drive either.