Budu

Budu is an anchovy sauce and one of the best known fermented seafood products in Kelantan and Terengganu in Malaysia, the Natuna Islands (where it is called pedek or pedok), South Sumatra, Bangka Island and Western Kalimantan in Indonesia (where it is called rusip), and Southern Thailand. It is mentioned in A Grammar and Dictionary of the Malay language, With a Preliminary Dissertation, Volume 2, By John Crawfurd, published in 1852. It is traditionally made by mixing anchovies and salt in a ratio ranging from 2:1 to 6:1 and allowing the mix to ferment for 140 to 200 days. It is used as a flavouring and is normally eaten with fish, rice, and raw vegetables.

Source: Wikipedia