太たい鼓こ判ばんを押おす

expression, godan verb (-su)

give a stamp of approval; vouch for

Idiomatic expression meaning to give a strong guarantee or endorsement, as if stamping with a large seal. Often used when someone confidently assures the quality or reliability of a person or thing.

• 彼かれの実じつ力りょくなら私わたしが太たい鼓こ判ばんを押おします。

  I can vouch for his ability.

• この製せい品ひんには専せん門もん家かが太たい鼓こ判ばんを押おしている。

  Experts have given this product their stamp of approval.