New Item: Goo block (Slime + honey)

The goo block would be made by mixing slime balls, and bottles of honey in the same pattern as sand & gunpowder for TNT. If a player/mob walks on top of the block, they are heavily slowed down, even turning around to get off the block would take a second.

Other features: The bottom, and sides of this block would not have the sticky effect, rather the opposite. It would be too slimy for things like spiders to climb up, rendering their climbing ability ineffective. If this block were set on the ground, it would cause the player/mob to "fall" off of it if they attempted to jump onto it. (Ice could also be given the "slip and fall" effect to some degree). 

Reason for adding: This block would give a new use for slime, as well as honey, You could say its the first block with a dedicated "trap" aspect to it. Would be great for PVP, adventure maps, and more. 

Appearance: The block itself would have mild transparency (like slime or honey blocks), and it would have swirls of each color, almost as if the two fluids were stirred together.