1880, George MacDonald, Sir Gibbie, Hurst and BlackettUp and down the street not a child was to be seen. A sandboy with a donkey cart was the sole human arrangement in it.
A proverbially happy or jolly person.
1910, O Henry, The Rubaiyat of a Scotch Highball, in The Trimmed LampDrink always rubbed him the right way, and he would reach his rooms as jolly as a sandboy.