tapped
v. C1 Advanced US //ˈtæpt// UK //tˈæpt// tapped
v. crazy, strange, or acting in a very weird way. You use this when someone is behaving like they have lost their mind.
v. mentally unstable, eccentric, or behaving in an irrational manner. Informal in register; often implies a person is disconnected from reality or acting out of character.
He is completely tapped if he thinks that will work.
The guy was acting totally tapped, shouting at pigeons in the middle of the park during rush hour.
While his earlier theories were merely unconventional, his latest claims about secret underground civilizations have led most of his colleagues to conclude that he has gone completely tapped.
Usage
Typically follows a linking verb like 'be', 'get', or 'go'.