kerbstone

reunakivi A paving stone that forms part of a kerb
1912, (w), w:Pygmalion (play)|Pygmalion, Act Ihttp://www.gutenberg.org/files/3825/3825-h/3825-h.htm

You see this creature with her kerbstone English: the English that will keep her in the gutter to the end of her days. Well, sir, in three months I could pass that girl off as a duchess at an ambassador’s garden party.

Gabriel often saw him on the streets, playing on the curbstone with other boys his age.