Definition
to act in a frivolous manner or to handle someone or something without proper care
胡闹；搞鬼；随意对待
He always mucks about with his work and doesn't take it seriously.
他总是对他的工作胡闹，不认真对待。
Stop mucking around; this is my computer, so please handle it carefully.
别胡闹了；这是我的电脑，请小心使用。
She loves to muck about in the kitchen, but it usually ends up in a mess.
她喜欢在厨房里搞鬼，但通常会搞得一团糟。