Thieves cant. [see CRACK sb. 18: cf. darkmans = night.] A hedge.
1610. S. Rowlands, M. Mark-all, Crackmans, the hedge.
1621. B. Jonson, Masque Met. Gipsies. To their libkins at the Crackmans.
1725. New Cant. Dict., s.v., The Cull thought to have loapd by breaking through the Crackmans.
1737. Bacchus & Venus. Thou the Crackmans down didst beat.