I used to do it all the time. I may have been really good at school, but it was boring as all get up, so I used up all of my sick days every semester. (luckily, I very rarely actually get sick, and on top of that, I'm the kind of guy that will still go to school or work if I'm sick.) Never anything specific though, just didn't want to go to school, would rather sleep.
I'm sure I've done it once or twice, I simply don't rem-...
It came back, just this second! Yeah, mom had me excused from school right around the time we were moving to the US, last legs of school back in Hungary. I was a bit shaken up at that time, so she said that it was cool.
Beyond that, no. Always had a good reason to miss stuff.
The vast majority of the time I won't, but to get out of a speech day (award ceremony thing) in secondary school I once made myself throw up. Like I said, normally I wouldn't, but THEY WERE SO DAMN BORING.