The name was coined in Manila, not Bicol — though Bicolanos point out that similar chili-and-coconut pork dishes such as sinilihan were cooked in the region long before the name existed.
Pork is simmered low in thick coconut milk with shrimp paste, garlic, and a heavy dose of long green and red chilies until the sauce reduces into a rich, fiery coating. It's ladled hot over rice at carinderias and food stalls across the country, though it hits hardest at stalls in its namesake region.