信口开河 (xìn kǒu kāi hé) | Meaning: to speak without thinking (idiom) | Chinese Idiom with Pinyin & Origin

to talk drivel · to assert sth without a proper understanding or basis in fact · not to know what one is talking about瞎说xiā shuō

to speak harshly but without any bad intent (idiom)有口无心yǒu kǒu wú xīn

to speak off the cuff · to casually opine信口雌黄xìn kǒu cí huáng

to talk nonsense (idiom) · frivolous talk言不及义yán bù jí yì

to alter a text indiscriminately (idiom) · to make irresponsible criticism妄下雌黄wàng xià cí huáng

(idiom) to blurt out; to let slip (an indiscreet remark)脱口而出tuō kǒu ér chū

to speak without thinking (idiom) · to blurt sth out