The closest approximation to Kummerspeck in English is probably "Freshman Fifteen," but in German, there are no timestamps on when Kummerspeck can happen. Whether you are worried, angry, or sad, if you turn to a block of cheese for comfort, you might be guilty of feeding your Kummerspeck.

Still, as a general rule, any word with bacon in it is a guaranteed win! (That may just be our Kummerspeck talking)