Curdled is also the name of a Quentin Tarantino film.

Curd is a dairy product obtained by curdling (coagulating) milk with rennet or an edible acidic substance such as lemon juice or vinegar and then draining off the liquid portion (called whey).

Curd products vary by region and include cottage cheese, quark and paneer (the latter by definition being curdled with lemon juice, thus qualifying by some definitions as a vegetarian food).

Cheddar cheese curds are popular in some French-speaking regions of Canada such as Quebec and parts of Ontario as well as in the Midwest of the United States. They are freshly made morsels of cheddar cheese before being pressed and aged. In Quebec, they are popularly served with french fries and gravy as poutine. In the U.S., they are breaded and fried or are eaten straight. There are also many varieties besides cheddar that are popular, such as white cheeses and flavored cheeses (pepper, garlic, butter, lemon, etc). The cheeses themselves are not flavored but rather lightly coated with a powdered flavor, natural or not, similar to potato chips.