Solid is just hash (or hashish) where I come from. Hash is made from balling up trichomes (or the little resin/thc glands all over your stickiest buds?) and letting them dry a bit. They're usually formed into bricks or chunks (that's why it's called solid) and it's alot more potent than plain bud itself.

I'm pretty sure you have hashish, there, buddy. But if you're not sure, you can send it to me, and I'll make sure for you.