Also, what's the beef? What is the source of a complaint, as in Where's the beef? No one was hurt in the accident. This usage employs beef in the sense of a “complaint” or “grudge,” also appearing in the phrase have no beef with, meaning “have no quarrel with.” [Slang; late 1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.