What does "To make the most out of something" mean? It seems to me highly idiomatic -- google gives me 1.860.000 results for the sentence "to make the most out of". In this case, if you need background, the full sentence is "There was a whole month I couldn't work him at all, and he did nothing but eat his head off. He's an awful eater. I've taken the best part of six hours a day out of him since, but I'm always afraid of his coming to grief again, and so I couldn't make the most even of that." It is a cab-driver speaking about his horse (a XIX century cab).