a poisonous or otherwise harmful mixture, usually liquid, of various elements
A witches brew of deadly war chemicals bubbles from the ocean floor.
witches' brew in American English
noun
1.
a potent magical concoction supposedly prepared by witches
2.
a harmful or threatening mixture; diabolical concoction
a witches' brew of innuendo and rumor
Word origin
[1925–30]This word is first recorded in the period 1925–30. Other words that entered Englishat around the same time include: chain reaction, gimmick, hot spot, payload, runout