sod

"Sod" has a few different meanings, and the exact one depends a lot on context. The most basic meaning is a piece of ground with grass growing on it and soil held together by the roots. This is the kind sold for making an instant lawn: you lay it down in strips or rolls instead of waiting for seed to grow. In this sense, it is very close to "turf," especially in everyday gardening and landscaping.

The word also appears in older historical use. A "sod house" was a house made from cut blocks of earth, especially in places such as the American prairies where wood was hard to find. Here, "sod" means the earth itself as a building material, not just lawn grass.

In British English, "sod" is also a mild swear word or insult. You can use it for a person, often with annoyance, affection, or pity: "you silly sod," "lucky sod," or "poor sod." It also appears in expressions such as "sod off," meaning "go away" in a rude, dismissive way, and "sod it," which is a mild way to show anger or frustration, similar to "damn it." There are also fixed phrases like "the old sod," often meaning someone's homeland, especially Ireland, and "under the sod," a literary way to mean buried in the ground. So the word can belong to gardening, history, slang, or idiom, all with a strong link to the ground beneath us.