To join in; participate; esp to intrude where one is not wanted
[1940s+; popularized by Jimmy Durante's lament, ''Everybody wants to get into the act'']
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with get into the act
get in the act. Become involved in some activity or venture, as in Everybody wants to get into the act on this offer, or I'm sure his agent plans to get in the act and start negotiations. This expression alludes to inserting oneself into a performance.