Sisig is a Kapampangan term which means "to snack on something sour". It usually refers to fruits, often unripe or half-ripe, sometimes dipped in salt and vinegar. It also refers to a method of preparing fish and meat, especially pork, which is marinated in a sour liquid such as lemon juice or vinegar, then seasoned with salt, pepper and other spices.

Sisig also refers to Sizzling sisig, a Filipino dish made from parts of pig’s head and liver, usually seasoned with kalamansi and chili peppers.