(slab) noun
1. The outside cut made from a log in sawing it into boards, planks, etc., often bearing the bark on one side.
2. A flat plate, piece, mass, or slice, as of metal, stone, chocolate, or the like.
3. U.S. Slang In baseball, the pitcher's plate.
—v.t. slabbed, slab·bing
1. To saw slabs from, as a log; to square by removing the slabs.
2. To cover with, or form of or into slabs. [ME; origin uncertain]

(slab) noun
Slime; viscous mud; mire.
—adjective Archaic Slimy; viscous. [<ON slabb mud]