1.
You use ~ to refer to activities connected with the theatre and drama, such as acting in plays or producing them.
Angela says she longs to join an amateur ~ class.
...the university ~ society.
N-UNCOUNT: usu with supp
2.
You talk about ~ to express your disapproval of behaviour which seems to show too much emotion, and which you think is done deliberately in order to impress people.
...another wearisome outbreak of Nancy’s ~.
N-PLURAL disapproval