不要乱来

don't mess around

→ 不
phrase Rare #25,095
don't mess around A warning telling someone not to act recklessly, improperly, or out of control. The tone can range from serious to playful depending on context.
CH: 听我的,不要乱来!
EN: Listen to me—don't do anything reckless!

威威,你不要乱来啊!

Weiwei, don't do anything reckless!

— 喜宴 (1993)

贺林贺林上校马上会去接他在贺林上校到之前好好招待他不要乱来

He Lin. Colonel He Lin will come pick him up soon. Until Colonel He Lin arrives, treat him well. Don't do anything foolish.

— 伊万的童年 (1962)

理纱小姐不要乱来

Miss Risa, don't do anything reckless.

— 崖上的波妞 (2008)

不要乱来!

Don’t do anything reckless!

— 英雄本色 (1986)

你们不要乱来呀!

Don't do anything crazy!

— 英雄本色 (1986)