我的直抒胸臆我的有口无心
[wŏ de zhí shū xiōng yì wŏ de yŏu kŏu wú xīn]
This phrase 'straightforward expression of feeling and speak carelessly'. It describes someone who tends to be frank, speaks out their feelings directly without holding back, but sometimes might offend others unintentionally due to lack of tactfulness