Magna Cum Loudly was the stage-name used by adult film performer Rebecca Kaminski. Before she was identified, she was dubbed the Concrete Blonde because she was found in the concrete floor of Bing's pool hall.
The actress appeared in the films Whore of the Roses and Tails From the Crypt before she was murdered in January of 1992.
The name is a pun on the term "magna cum laude."