to top it all

to top it all (British, American & Australian, American & Australian)

if you have been describing bad things which happened, and then say that to top it all something else happened, you mean that the final thing was even worse. The washing machine flooded, my car broke down, then to top it all I locked myself out of the house.

See also: all, top

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to top it all (off)

1. and the worst thing is. The washing machine flooded, my car broke down, then to top it all off I locked myself out of the house.

2. and the best thing is. Students get to meet the world's top scientists and researchers, and to top it off, the conference is free.

cap something off

See also: all, top