A newish phrase that simply MUST GO!

[Janit]

Zoidberg wrote:
[quote=M A V I C]
I actually like the phrase simply because it's a sign of people letting go of something they have no control over.

Agreed.
It can also be used as an admonition to another person that THEY should let go of something that they cannot control. This is the usage that is most familiar to me. The speaker resorts to a tautological platitude out of frustration because he/she knows that no amount of explanation will suffice for some people:

Parent says, "Why can't you be smart like your brother? Why can't you be a doctor or a lawyer? Why do you have to be an artist?"

Adult son replies, "It is what it is."