Chilk is the name used when referring to milk that has spoiled due to a bacterial infestation. This is true chilk. However, the name chilk can be given to any of the following:
The vaginal discharge of the female Sunarusian porpoise.
The milk of a racoon after it has been detoxinated.
An amalgamation Chill and Milk. Registered trademark of Chilk(tm) LLC. It is a vegan nut milk drink with hemp extract infusion. Popular with urbanites.