To speak off the cuff or opine casually while disregarding or twisting the facts; specifically used when someone makes groundless or malicious criticisms. This term is stronger than [[信口开河|信口開河|xin4 kou3 kai1 he2]], which focuses more on talking nonsense or rambling without responsibility.

to make irresponsible criticism or alter a text indiscriminately; to make arbitrary comments without sufficient knowledge or care

to criticize without careful thought or regard for the facts; originally used to praise someone who could quickly correct their own mistakes as they spoke