noun
decorated cake; fancy cake
A cake that is elaborately decorated, often for celebrations. Wasei-eigo from English 'decoration cake'.
wasei-eigo (Japanese-coined English), from decoration cake
誕生日にデコレーションケーキを買った。
I bought a decorated cake for the birthday.
この店のデコレーションケーキは見た目が華やかだ。
The decorated cakes at this shop look gorgeous.