I thought the two were the same thing. I’ve got a gelding that, I guess out of boredom, has starting doing something similar to cribbing. He put his head over his gate or the fence so that his throat is resting on top. He pushes down and sucks in. Same way a cribber would except he’s not biting on anything. Just pressing on his throat. This has been going on for a while now. I thought to begin with maybe his throat was bothering him. Vet checked him out and said it was fine. But he wasn’t familiar with one doing this. I’ve had cribbers in the past and collars always work but I don’t see it working on him the way he’s doing it. Anyone seen this before an dknow what it is or why he’s doing it? 

Down here we call that “ air cribbing “. Some horses don’t have to brace their mouth on anything to crib. I’d put a collar on him.

Yes, that is a form of cribbing.  

Agreed, that’s a form of cribbing. 

For what it’s worth, if you’re spending time around race horses, “wind suckers” are mares that suck air into their vaginas while they are running, and wind sucking is the act itself. That’s one of the reasons why caslicks are put in. Most people I know use the term in that regard, however it sounds like some people use it in relation to cribbing.

I have a gelding that has been doing that for several years.  When I first got him and noticed it the vet scoped him and said that his wind pipe was fine and not to worry about it.  Several vets said that they can't say that cribbing causes colic.

My very first horse was a wind sucker. He would do it free standing. No cribbing or leaning over the fence, just standing there bending at the poll and bringing his chin to his chest. He would do it quickly. Sometimes a cribbing collar would help. He got gas colic at least once a year from doing it.