Meaning of 'Cry me a river'

There’s a song called “Cry me a river” by Justin Timberlake.

Can someone please tell me what it means?

Hi,

Simply put, it suggests you cry buckets and buckets and buckets - enough to fill a river. As you can see in this verse:

Now you say you’re lonely, you cry the whole night through;
Well you can cry me a river, cry me a river,
I cried a river over you.

Alan

Often, the phrase is used in a sarcastic sense also. When somebody starts complaining about something, and I’m for some reason particularly unsympathetic, I might (and have!) say, “Oh, cry me a river, why don’t you?”

Hi yas,

I associate the line ‘cry me a river’ with a little girl-like/gay-like winging, but there’s also this truly touching and magnificent jazz version by Diana Krall!