Wiktionary
class action lawsuit
n. A type of lawsuit in which the claims and rights of many people are decided in a single case.
Usage examples of "class action lawsuit".
And they told me they're putting together this big class action lawsuit against him and this whole bunch of doctors and this company that made the jelly if I start to lose my hair and my memory like this other lady I was scared to tell you, there's something else I was scared to tell you Christina.