xìn kǒu kāi hé
to speak without thinking (idiom)
to blurt sth out
xìn kǒu cí huáng
to speak off the cuff
to casually opine
xìn kǒu
to blurt sth out
to open one's mouth without thinking
xìn kǒu hú shuō
to speak without thinking
to blurt sth out
xìn kǒu kāi hé
variant of 信口開河|信口开河[xin4 kou3 kai1 he2]