Daily Chinese Idiom Guessing Game
To not attend to one's proper business or duties; to neglect one's main job in favor of trivial pursuits.
务从事。指丢下本职工作不做，去搞其他的事情。
明·兰陵笑笑生《金瓶梅词话》第一回这人不甚读书，终日闲游浪荡，一自父母亡后，分外不务正业。”
He spends all day playing video games instead of studying; his parents say he is 不务正业.