That would just be gravy on the icing

The yuck factor is high on this one, but it’s a great malaphor.  It was said by someone who was discussing the possibility of getting more money than she anticipated.  This is a congruent conflation of “icing on the cake” and “the rest is just gravy”, both meaning an extra enhancement.  Perhaps this one describes a little too much enhancement.    Coincidentally, I received this malaphor from two people last week who don’t know each other so kudos to Deb Rose and Jonathan Ogle for sending this one in!