(also be sharp-tongued)

to be someone who often criticizes and speaks in a severe way

说话尖刻，有一张刀子嘴

“have a sharp tongue” 是一个英语成语，意思是某人说话尖刻，言辞犀利，通常指这个人说话直接，有时甚至会伤害他人。这种表达方式形象地描述了言辞像刀一样锋利，能够刺痛或伤害别人。

豆腐心 soft heart

Jane has a sharp tongue, so be warned.

小心点，简说话很刻薄。