Entry
  1. Na-adjective (keiyodoshi), Adverb (fukushi), Suru verb

    exhilarated; all smiles; tickled pink; pleased as punch

    Colloquial

    競馬で万馬券を当ててウハウハなんだ。
    I'm tickled pink about winning 10,000 yen at the horse races.

Also written うはうは

Pitch on OJAD