to top/cap/crown it all
to crown it all
An expression indicating the final item in a list of particularly positive or negative experiences or situations. What a bad day—I left my phone in the grocery store, my car broke down on the way home, and, to crown it all, my groceries broke through the bag as I was walking to the front door. They really threw me a wonderful party. Costumes, games, and, to crown it all, my favorite kind of pie.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
to ˌtop/ˌcap/ˌcrown it ˈall(spoken) used to introduce the final piece of information that is worse than the other bad things you have already mentioned: We went to a horrible restaurant. The food was awful, the music was far too loud, and to top it all, the waiter was rude to us.
Farlex Partner Idioms Dictionary © Farlex 2017