A section of grass-covered surface soil held together by the roots of the grass. The landscaper laid down new sod to create a lush, green lawn.
A piece of turf cut or torn from the ground. He carefully placed the sod back after digging the hole for the new plant.
A person, often used informally to refer to someone in a slightly derogatory or affectionate manner. He's a lucky sod, winning the lottery twice in one year.