Exactly what you would expect. Literal milk from the utters of a woman dog. Meant for young dogs, but consumed by Hawaiian natives since the 15th century. Griffin Sutterfield's preferred form of milk.
Griffin poured himself a nice cool glass of dog milk for his afternoon snack.

I only have a dog for the milk. Dog milk is the most fresh when its straight from the utter. - Griffin Sutterfield
by Your Mom's ex-boyfriend November 04, 2019
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(Rural Chinese) A female dog whose milk is intended for human consumption.
Lowry: I hope there’s no milk dogs here.
Serpenza: oh no, this is definitely a place where they breed milk dogs. (Shows a picture of a child drinking a dogs milk from the teat)
Me: what’s a milk do- oh, alright then
by Sharpguyinatie May 01, 2019
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A milk dog is a feral pregnant dog with her tits hanging out that is mostly going to bite you, to protect her young. If you get close. They are everywhere in china.
Better get out of here. There's a Milk Dog there
by Lee's June 29, 2020
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The purest kind of dog, very Christian, very good. The goodest dog.
"Wow, that dog is a Milk Dog!"
by notnyasnt July 09, 2019
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