"mess around" 是一个常用的英语动词短语，含义丰富，需结合语境理解核心意思。以下是其主要含义、用法及例句：
"mess around" 本质表示“无目的、不认真地行动”，可细分以下常见场景：
指无所事事地消磨时间，或做无意义的事。
结构：`mess around (doing sth.)`
例句：
We spent the whole weekend just messing around at the beach.（我们整个周末都在海滩瞎混。）
Stop messing around with your phone—let's get started!（别再玩手机浪费时间了，开始吧！）
I don't have time to mess around—the meeting starts in 10 minutes.（我没时间瞎晃了，会议10分钟后开始。）
指行为不负责任、调皮捣蛋（常指小孩或成年人的幼稚行为）。
结构：`mess around (in/with sth.)`
例句：
The kids were messing around in the classroom and broke a window.（孩子们在教室里胡闹，打碎了窗户。）
If you mess around with the fire, you'll get hurt.（别乱玩火，会受伤的。）
The teacher told us to stop messing around and listen.（老师让我们别胡闹，认真听。）
指随意、不专业地操作某物（可能导致损坏）。
结构：`mess around with sth.`
例句：
Don't mess around with the computer settings—I just fixed them!（别乱改电脑设置，我刚调好！）
He's always messing around with old radios in his garage.（他总在车库里摆弄旧收音机。）
指和某人保持不严肃的浪漫/性关系（非正式）。
结构：`mess around with sb.`
例句：
I heard she's been messing around with her coworker.（我听说她在和同事暧昧。）
He warned me not to mess around with his sister.（他警告我别和他妹妹调情。）
特指背叛伴侣，与他人暧昧/出轨，需用介词 `on`。
结构：`mess around on sb.`
例句：
She left him when she found out he'd been messing around on her.（她发现他背叛自己后，就分手了。）
I would never mess around on my wife—she's everything to me.（我绝不会背叛妻子，她是我的一切。）
同义词：`fool around`（与 `mess around` 几乎完全通用，尤其指“瞎混”或“调情”）；`mess about`（英式英语，含义相同）。
语境区分：
同样是 `mess around with sb.`，若双方是朋友，可能是“互相瞎闹”（如：We were just messing around with each other—no harm done. 我们只是互相瞎闹，没坏处。）；若为异性，则更可能是“调情”。
| 含义 | 结构 | 例句 |
|---|---|---|
| 瞎混/浪费时间 | mess around (doing sth.) | Stop messing around and work! |
| 胡闹/捣蛋 | mess around (in/with sth.) | The kids messed around in the pool. |
| 摆弄某物 | mess around with sth. | Don't mess around with the remote. |
| 和某人调情 | mess around with sb. | She's messing around with her gym buddy. |
| 背叛伴侣 | mess around on sb. | He messed around on his wife. |
通过以上场景和例子，可快速掌握 "mess around" 的灵活用法～