おくじょうおくをかす

屋上屋を架す

to do something useless; to gild the lily; to gild refined gold; to build a roof atop the roof

N3Expression
Expression, Godan verb (su ending)
to do something uselessto gild the lilyto gild refined goldto build a roof atop the roof

Example Sentences

同じことを何回繰り返すの。屋上屋を架すようなくどい説明は勘弁してよ。

You're wasting your time with all this needless repetition, so spare us the long-winded explanation.