Chumming

[2][3][4] In the past, the chum contents have also been made from "offal", the otherwise rejected or unwanted parts of slaughtered animals such as internal organs.

[7] In the United Kingdom, it is also known as rubby dubby (West Country and Yorkshire),[8] shirvey or chirvey (Guernsey),[citation needed] and bait balls.

[5] Sour grain is a commonly used form of chum bait when fishing for catfish in inland waters of the Southern United States.

Additionally, indigenous people would tie a dead animal from a tree above a stream encouraging flies to lay eggs.

[11] Chumming is illegal in some parts of the world (such as in the U.S. state of Alabama)[12] because of the danger it can pose by conditioning sharks to associate feeding with human presence.