For twain he tried to disprove Charles Darwin's evolution theory
The direct object is water.
horse = subject
drank = verb
The horse drank what?
water.
Answer:
This phrase means to every fast -- swallowing your food almost without chewing -- like a child who wants to finish the meal quickly to run off and do something else ....like stuffing a sandwich in your mouth and eating the whole thing in 2 or 3 bites.