IMO, tire kicker is probably a term that has a different definition depending on the person.
However, I think what is 100% inarguably a tire kicker is the person or persons like some users mentioned above. They just wanted to get some riding time in. I don’t think there’s any defence a person could give me in that scenario.
Otherwise, an online type of tire kicker would be someone who asked for lots of additional info, maybe even more video or photos, and then disappeared without a word. Any time I’ve been buying a horse and either seen or heard something that didn’t jive with me, I’d make sure to tell the seller I was no longer interested and to thank them for their time.
I don’t think a tire kicker is someone who sees the horse in person, after asking some questions and maybe even for more video, and then doesn’t go through with a purchase. There are lots of reasons for people to move on when they’ve gone out and seen the horse. Sometimes it’s better to walk away with a “thank you for your time, but we won’t be buying the horse” in some situations. It may leave the owner mystified, but some owners do not take well to the reasons behind why. I had tried out a horse years and years ago now, really liked it. We had the vet out to do a PPE and he didn’t feel comfortable endorsing the horse without doing x-rays, just felt something was NQR. The x-rays were not good, I forget what they showed now but the vet determined his soundness was questionable. The owner was in the barn since she was showing another horse while the PPE was going on and absolutely lost it on our vet. She proceeded to verbally berate him, and we all high tailed it out of there before she tried to hit him.
Now, most owners and sellers, I’d like to think, would not be so reactive. Few years later, I was trying a different horse and decided to pass on her since my vet had some big suspicions about her feet. Essentially, “why buy someone else’s problem” sort of deal. I decided to share the results of the PPE with the owner, since she seemed quite sweet and concerned. She did send me a follow up email about having her own vet out to check the horse, who had agreed with mine, and they were going to be rectifying the issue going forward.
Rambled a bit there, but anyway. Tire kicker is a term I think is hard to define, because you don’t always know someone’s motives or reasons, buyer or seller. Definition may change from person to person, depending how much of their time they feel someone is wasting. By and large, I think when you start looking to sell a horse or looking to buy a horse, there may be any number of frustrating things you could deal with. It’s par for the course.