I told him that I thought he was crazy and got 'the silent treatment' for the rest of the day. [=he refused to talk to me for the rest of the day]
You have the 'right to remain silent'. [=the legal right not to say anything when you are arrested]
Whenever she gets mad at me, she 'gives me the silent treatment'. [=she does not speak to me]
(..) HARRY: This year we're doing it right. Thanksgiving in Vermont, Christmas in Switzerland... -Christmas in Gstaad is gonna cost us... -"Staad." The "G" is silent. "Staad." George? -"Staad." -Trent? -"Staad," man. -So what about Staad? Fine. The "G" may be silent, but it's gonna take at least three grand to get there. I'll have to talk to my father. Better yet, have my father talk to your father. Or my father talk to your father. (..)1992 Scent of a Woman