What does 'sing your heart out' mean?

The construction "to [something] your heart out" is an English idiom and has several variations and meanings. The part "your heart out" basically means with vigorous or intense conviction. read more

To sing your out more literally means to sing with great conviction or great gusto and sincerity. Of course, it doesn't mean to sing loudly at the top of your voice, which then isn't necessarily a positive thing. The more figurative meaning is as above. read more

sing (one's) heart out To sing with great zeal or enthusiasm, to the fullest extent of one's ability. I was surprised when that shy little girl got up on stage and sang her heart out. read more