Greetings, Fellow Posters:
If you're from the UK -- or of the pure English expression in another kingdom -- you have probably heard this expression. I learned it from an elderly English chap. It seems to fit many of us here in our circumstances:
To send someone to Coventry is an English idiom meaning to deliberately ostracise someone. Typically, this is done by not talking to them, avoiding someone's company, and generally pretending that they no longer exist. Victims are treated as though they are completely invisible and inaudible. -- Wikipedia.org