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1.
A disagreement in which the beefee is unaware of.
Tom: Melissa said that she wants to come tonight, that okay?
Jack: Uh, no...I'm sort of having a Secret-beef with her about that guy a few weeks back.
Tom: Why haven't you told her that it bothered you?
Jack: I don't want to deal with the bullshit, it isn't necessary.
by Ryryq March 24, 2010
 
2.
secret jealousy hatred... when someone despises you for no specific reason.
Damn, how she get a car like that? How she get to be one of that nigga hoes? THAT'S SECRET BEEF
by Tameka July 05, 2006