Escrow , if anyone is at all interested, is a financial term, which was pirated by MS, and probably many others. some time ago.
Essentially it means money, or funds, are being frozen, or held over, awaiting further investigation.- This would, as an example, be the case of bank accounts held by a convicted criminal.
As is obvious, putting it into a loose IT interpretation, it means, as we have surmised, that the development branch has stopped (development) and is now concentrating on cleaning up.
I can think of several ways to turn the letters into rude and sarcastic mnemonics.