crab-sidlev.
Etymology: < crab n.1 + sidle v.Previous versions of the OED give the stress as: ˈcrab-sidle.
1803 R. Southey (1856) I. 105 They were obliged to walk..some backwards like lobsters, others crabsidling along.
This entry has not yet been fully updated (first published 1893; most recently modified version published online June 2019).