Ketchup, (also spelled catsup) is a condiment, usually made from tomatoes. The ingredients in a typical modern ketchup are tomato concentrate, spirit vinegar, corn syrup or other sugar, salt, spice and herb extracts (including celery), spice and garlic powder. Allspice, cloves, cinnamon, onion, and other vegetables may be included. Ketchup started out as a general term for sauce, typically made of mushrooms or fish brine with herbs and spices. Some popular early main ingredients included blueberry, anchovy, oyster, lobster, walnut, kidney bean, cucumber, cranberry, lemon, celery and grape. Mushroom ketchup is still available in some countries, such as the UK, and banana ketchup is popular in the Philippines.
Ketchup is often used with french fries (chips), hot dogs, hamburgers, sandwiches and grilled or fried meat. Ketchup is also used as a base for various sauces. In countries such as Australia, New Zealand and in South Africa the term 'tomato sauce' is used instead of the British and American usage of the word ketchup. Ketchup is also known as tomato ketchup, tomato sauce, red sauce, Tommy sauce, Tommy K, or (in Australian rhyming slang) "dead horse".