有口无心,汉语成语,意思是嘴上说了,心里可没那样想。指不是有心说的(say what one does not really mean),可以翻译为be sharp-tongued but not malicious。
例句:
他是个直来直去的人,说话有口无心。
Hes a blunt man, often speaking sharply but meaning no harm.
他这个人有口无心你是知道的。
You know what he is like. He says whatever enters his mind.