Someone at Cupertino is a fan of the criminally short-lived Arrested Development, as evidenced by this entry in the iPhone dictionary of "Mayonegg." Don't get it? Here's a clip to put it in context.
Update: OK, so it looks like someone was just typing "Mayonegg" into their iPhone a lot and the dictionary learned it. Not as exciting, but I'm leaving this post up because I love that clip so much. [The Triumph of Bullshit]