British Dictionary definitions for icing on the cake
frosting
/ˈfrɒstɪŋ/
noun
1.
a soft icing based on sugar and egg whites
2.
Also called icing. a sugar preparation, variously flavoured and coloured, for coating and decorating cakes, biscuits, etc
3.
a rough or matt finish on glass, silver, etc
4.
(slang) the practice of stealing a car while the owner has left it idling to defrost the windows and heat the engine
Word Origin and History for icing on the cake
frosting
n.
1610s as an action; 1756 as a substance; meaning "cake icing" is from 1858; verbal noun from frost (v.).
Slang definitions & phrases for icing on the cake
icing on the cake
noun phrase
An enhancement; a bonus: going out to dinner and a movie is icing on the cake
Idioms and Phrases with icing on the cake
icing on the cake
Also, frosting on the cake. An additional benefit to something already good. For example, All these letters of congratulation are icing on the cake, or After that beautiful sunrise, the rainbow is just frosting on the cake. This metaphoric expression alludes to the sweet creamy coating used to enhance a cake. [ Mid-1900s ]