Pink s**t

[RCMerchant]

...they usta throw on top of vomit when someone puked on the school bus? What was that?

[The Burgomaster]

I always thought it was sawdust.

[RCMerchant]

But it was pink. And had a smell all it's own.

[AoTFan]

Funny, at my school it was orange.

[Chainsawmidget]

There are a bunch of different brands of stuff they use with named like Voban, Sandsorb, Absorb-it, Stay Dry, really too many of them to name.

They tend to all be labeled as vomit (sometimes body fluid) absorbent granules. 

Basically, it's kitty litter.  Sometimes with a few extra chemicals added in. 

[Trevor]

...they usta throw on top of vomit when someone puked on the school bus? What was that?

It was what was left over from washing my undies. 

[bob]

I think it's to make the smell less nasty.