What do you think about Wendy's vanilla Frosty?

That's an arbitrary definition. Milkshakes can be made with milk and ice cream and be thick as hell. A straw is a tool used for drinking, so I'd say if you can't drink it, then it's not a milkshake. But it doesn't hinge on a straw.

Edit: I think a blizzard could classify as a milkshake as you can drink it. You might have to give it a minute or two to defrost, but it is possible.

You can do that with a block of regular ice. Just wait a few minutes and you can drink that, too.
God is the greatest Kolache in the Universe.

Damn rite. We\'ll have to check out the area next weekend for some kolaches.