Cry (one's) eyes out informal verb phrase
The noun "eyes" can be replaced by "heart."
To weep or cry a lot and for a long time
After I got fired, I came home and cried my eyes out.
He cried his eyes out when he knew the truth.
She has been crying her eyes out since this morning.
A towel to dry one's tears.
Used when one starts crying in order to get sympathy or attention
Used to describe a baby who cries loudly
To weep a lot and even profusely
The verb "cry" should be conjugated according to its tense.
This phrase can be traced back to the early 18th century. It is mentioned in Colley Cibber's 1705 play, The Careless Husband: “I could cry my eyes out,”.
In the nineteenth century, it was sometimes changed to "crying one's heart out," notably in popular romance novels like Margaret Oliphant's Joyce 1888.
The similarity between the children and their parents
I looked at my father's eyes, then looked at my eyes. I thought the apple doesn't fall far from the tree.