Meaning of (AS) HAPPY AS A SANDBOY (OR BRIT. LARRY OR N. AMER. A CLAM) in English

(AS) HAPPY AS A SANDBOY (OR BRIT. LARRY OR N. AMER. A CLAM)

(as) happy as a sandboy (or Brit. Larry or N. Amer. a clam)

extremely happy. [prob. orig. denoting a boy hawking sand for sale.]

→ happy

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.