rotten egg yolks

a synonym for bad news, with unpleasant consequences usually to follow

father: son come here. You bloody report card is here.

son: oh, is it really full of rotten egg yolks ?. if my report card is nothing but rotten egg yolks, I won't even bother looking at it.

father: in that case, lol, I can take away your allowance. Now, kiss Don Corleone's ring or die.

son: I guess either you eat bacon, or you are wrong.