crabwise
From Longman Dictionary of Contemporary Englishcrabwisecrab‧wise /ˈkræbwaɪz/ (also crabways /-weɪz/) adverb SIDEsideways I moved crabwise along the edge of the cliff.Examples from the Corpuscrabwise• He had sidled up to it crabwise but to his surprise Tory Central Office had welcomed him.• The plane staggered and refused to fly straight; it lurched crabwise out of one shell-blast and into another.