go dark
US /ɡoʊ dɑːrk/
UK /ɡoʊ dɑːrk/
1.
to become inactive or cease operations, especially in a secretive or unannounced manner
:
•
The rebel group decided to go dark after the failed mission.
•
The company will go dark for a few days for system maintenance.
2.
to become uncommunicative or unresponsive
:
•
After the argument, she just went dark and wouldn't answer my calls.
•
He tends to go dark when he's stressed.