What is actually a hiccup?

I know a hiccup is caused by a spasm of the diaphragm, but what happens anatomically that is different from a normal hiccup when you have one that hurts? I've had owie hiccups before but tonight I had one that hurt SO bad, I had to stop what I was doing...

why does a person hiccup and what makes a person hiccup?

What is a Hiccup? How is it caused? Whats the origin of the word (Hiccup)? Any solutions or ways to get rid of them?

I've heard many things like it's an air bubble or something along those lines. What exactly is a hiccup anyway?

I keep doing this thing where I get air in my throat and burp, only it first comes out like a hiccup and then the burp. What could be causing this and how can I stop it? It's been ongoing for the last three days and I do it quite often.

what makes a person hiccup

Everyone has gotten hiccups, and I was just wondering how and what makes them form.

I read this book an author wrote on her pregnancy an she kept talking about her baby hiccuping? What does that mean/ feel like??

It's been months since I've gone a day without hiccuping. Every time I eat (or drink) I get a hiccup (not a bout of hiccups, just one) 10 or so minutes later, then I get another around 15 minutes later, then I get another 25 minutes later, etc...and...