the icing on the cake
US /ðə ˈaɪsɪŋ ɑn ðə keɪk/
UK /ðə ˈaɪsɪŋ ɑn ðə keɪk/
1.
an additional good thing that makes a good situation even better
:
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Winning the championship was great, but getting to celebrate with all my friends was the icing on the cake.
•
The beautiful weather was the icing on the cake for our perfect picnic.