cap it all

Từ điển Oxford Advanced Learner 8th

▪ I. to cap/top it ˈall idiom
(informal)used to introduce the final piece of information that is worse than the other bad things that you have just mentioned
•And then, to cap it all, it started to rain!
Main entry: ↑cap_idiom
 
▪ II. to top/cap it ˈall idiom
(informal)used to introduce the final piece of information that is worse than the other bad things that you have just mentioned
•And then, to top it all, it started to rain!
Main entry: ↑top_idiom