Gag up
When someone's mouth is covered with something stupid and they're tied up like a criminal, and they can't even yell at you.
My dad gagged me up with a dish towel and tied me to the couch for missing my chores.
The kid got gagged up with a bandana and tied to a chair for cheating on the test.
She gagged him up with a towel and left him there for an hour.