adj thick; viscous.
2. slab ·noun the slack part of a sail.
3. slab ·noun the wryneck.
4. slab ·noun that which is slimy or viscous; moist earth; mud; also, a puddle.
5. slab ·noun an outside piece taken from a log or timber in sawing it into boards, planks, ·etc.
6. slab ·noun a thin piece of anything, especially of marble or other stone, having plane surfaces.