我妈妈会气得脸通红，然后跌跌不休地说些刻薄话。

My mother would go red in the face and spout bitter recriminations.

《柯林斯英汉双解大词典》

她的刻薄话使他预感到她的愤怒。

Her caustic remark gave him a foretaste of her anger.

youdao

即：在决定要不要说出粗鲁、刻薄话的时候。

And that is the decision to say something rude or mean.

youdao