123 Chinese Idioms (成语), 100 from the Singapore Primary School Curriculum List—more soon!
zì yán zì yǔ
Literal Meaning 字面意思
Self words, self language
To talk to yourself ; mutter to yourself
Similar English Idioms 相似英文习语
Talking to oneself
街上那个男的是在自言自语，还是在用无线耳机讲电话？ Is that man on the street talking to himself or is he using a wireless earphone?