remove slabs from (a log or tree) to prepare it for sawing into planks

he slabbed the log on the two other remaining sides to make a rectangular timber

a large, thick, flat piece of stone or concrete, typically square or rectangular in shape

paving slabs

she settled on a slab of rock

a large, thick slice or piece of cake, bread, chocolate, etc.

a slab of bread and cheese

an outer piece of timber sawn from a log

the slabs I trimmed away from the logs became the siding for the cabin walls

a pack containing 24 bottles or cans of beer