ON ALL FOURS

{adv. phr.} 1. On all four legs; on hands and knees. * /Fido sat up to "beg" but dropped down on all fours to eat the dog biscuit Sam gave him./ * /Billy's father got down on all fours and gave the baby a ride./ 2. {informal} On a level of equality; of the same value. * /Wigs may be widely used, but they are still not on all fours with beautiful natural hair./