信口开河

信口開河
xìnkǒukāihé
  1. to speak without thinking (idiom)
  2. to blurt sth out

CEDICT

to speak carelessly, rapidly and voluminously like the outflow of river water when the sluice gates are opened; to talk nonsense; to talk at random

Wiktionary

不加思索的随意乱说。《孤本元明杂剧．渔樵闲话．第一折》：「似我山间林下的野人，无荣无辱，任乐任喜，端的是信口开河，随心放荡，不受拘束。」《红楼梦．第六三回》：「贾蓉只管信口开河，胡言乱道之间，只见他老娘醒了，请安问好。」也作「信口开喝」、「信口开合」。

重編國語辭典

指不加思索地随口说出

維基詞典

Entry Composition

1 信口 xìnkǒu
  1. to blurt sth out
  2. to open one's mouth without thinking
2 开河 kāihé
  1. to open a river
  2. to dig a canal
  3. to thaw (of river)

Related entries

信口 xìnkǒu
  1. to blurt sth out
  2. to open one's mouth without thinking