Noun

1. A male swan.
2. The portion of a corn plant around which the kernels grow.
3. a round loaf of bread; a small (4" diameter), round piece of crusty bread (in the English Midlands)
4. short for cobnut
5. short for cobble or cobblestone
6. mud used as a building material, placed then dried. Also called rammed earth or pisé.
7. a horse having a stout body and short legs
8. a gull.

Verb

1. To cut, trim or break into blocks of a convenient size.
2. To construct using mud blocks or to seal a wall using mud or an artificial equivalent.
3. (possibly colloquial, N UK) to throw, chuck, lob