1. [late 19C+] (orig. US) a routine, a way of behaving, a performance.
2. [1940s] (US Und.) cross-examination of a prisoner.
[1950s+] (orig. US) to modify or improve one’s behaviour.
see separate entry.
[late 19C+] to perform in a given manner; usu. combined with a specific n. or proper name, which defines the ‘act’ in question.
[1980s+] (N.Z.) to act in a shy manner; to sulk.
[late 19C+] (US) to pretend to a particular (by context) style of behaviour, to assume (often deceitfully) specific characteristics; in comb. with n., adj. or proper name.
[1970s+] (orig. US black) to calm down, to plan sensibly, to state a goal and aim for it.
[1970s+] (orig. US black) to be in full control of a situation, whether emotional, social, sexual, financial etc.
[1930s+] to pretend to behave in a specific way, to perform a certain routine.
[1930s] to put on a show with the intention of deceiving or defrauding someone.
[1930s+] to show off, to talk for display, to behave insincerely.
[1910s+] (US) to interfere, to spoil someone’s plans.
SE in slang uses
[late 19C] working as an actor.