noun
drinking, gambling, and buying women (in prostitution)
A set phrase listing three classic vices, often used to describe a dissolute lifestyle or the temptations that lead a man to ruin. The phrase is fixed and not used as a productive verb combination.
彼は若い頃、飲む打つ買うの放蕩生活を送っていた。
In his youth, he led a dissolute life of drinking, gambling, and buying women.
「飲む打つ買う」は、男をダメにする三大悪癖と言われる。
Drinking, gambling, and buying women are said to be the three great vices that ruin a man.