on all fours

phrase2

1. •
   On one's hands and knees.

   • A bulky form was seen rising aft, and began marching on all fours with the movements of some big cautious beast. — 1897
2. •
   In a manner which is similar in nature or effect to something else; consistent.

   • The paternal longing ran on all fours with her own desire. — 1886