to 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.
See also: all, crown

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.
See also: all, cap, crown, top