I can't tell if this is a compliment or an insult.
Anyway, I'm surprised that you really have never heard of "skid" in 30 years. It's such a common term in American pool. The Brits call it "kick." Billiards Digest's Dr. George Onoda had a great article on it over 15 years ago. Dr. Dave and Bob Jewett have articles on it online. And these forums have talked enough about skid for anyone's lilfetime.
Skid = excessive throw. One theory is that the cueball will still have chalk on it after being struck. When that same spot that has the chalk on it hits the object ball at contact, the balls will grab longer than what you would normally see. When you're standing there watching, you can see the balls grab together and slide coupled for a few milliseconds.
On at least one of the long TAR matchups, the object balls were picking up remnants of something from the pockets. Unless you've seen a photo of these balls, most people have no clue just how bad these balls got. It's a wonder there wasn't more skidding going on with all that extras shmutz on the balls.
On new clean tables with Simonis, e.g., the chalk tends to stay on the cueball longer rather than getting rubbed off by the cloth. So, I think the phenomenon is that the chalk spots on the cueball just get multiplied.
Fred
I agree with all the above, but in my case it's the new cloth. I have good clean Armith Pro balls and I keep my table very clean. Johnnyt