Noun
sister act (plural sister acts)
(slang) group sex involving two or more sisters (female siblings of each other) with one or more men.
I have a really hard time watching my sister act in anything but especially anything where it's a strong emotion. Whether she's crying or she's angry or she's - whatever emotion she's feeling I actually think that she's feeling it and I want to hug her and make it all better. Kay Panabaker
Whoopi and I have been friends ever since she claimed she couldn't sing on the set of Sister Act. Jenifer Lewis
A gospel choir of singers will be accompanying a special screening of the iconic Sister Act film. Source: Internet
BROS Musical Productions bring Sister Act to Bognor’s Regis Centre from May 22-26. Source: Internet
Sister Act and Sister Act 2 are the closest that most people have come in recent years to understanding life in the convent. Source: Internet