Dewberry snail [swEng]. Truant from school. (The dewberry is a close relative of the blackberry.)
Fast as a maid can eat blackberries [swEng]. Blackberry (patch) baby [Amer]. One bom out
o f wedlock.
It pricketh betim es that will be a good thorn [c. 1350]. A child soon shows signs o f future propensities.