白活 (bái huo)

Make empty talk; talk big; talk nonsense

例：这个人特别能白活。不过，他的话你可不能全信。

(zhè gè rén tè bié néng bái huo. Bú guò, tā de huà nǐ kě bù néng quán xìn)

This person is very talkative, but you really can’t believe everything he says.