Noun
(uncountable) A milky liquid made from soy beans and used as a beverage, cooking ingredient or substitute for dairy milk.
(countable, informal) An individual serving of such a beverage.
Source: en.wiktionary.orgI pity the fool who drinks soy milk. Mr. T
There's no such thing as soy milk. It's soy juice. Lewis Black
[Compared to cow's milk] soy milk is only deficient in blood pus, antibiotics, artery-clogging fat, and cholesterol. Michael Greger