乱说

bù yào luàn shuō

不要乱说。

Don't talk nonsense.

dāng miàn bù shuō rén hòu luàn shuō

当面不说，人后乱说

gossip behind people's backs but say nothing to their faces

luàn shuō yī dùn

乱说一顿

idle chatter

bié zài bèi hòu luàn shuō

别在背后乱说！

Don't gossip behind people's backs!

tā yī zhí luàn shuō wǒ huài huà wǒ bù huì kuān róng xia qu de

她一直乱说我坏话，我不会宽容下去的。

She’s been lying about me, and I won’t stand for it.

luàn shuō wán xiào

乱说玩笑

perpetrate a joke