Noun
All four legs of a quadruped; or the two legs and two arms of a person.
Source: Webster's dictionaryall-fours
As with otariids, it can turn its rear flippers forward and move on all fours; however, its swimming technique is more like that of true seals, relying less on flippers and more on sinuous whole body movements. Source: Internet
Apparently unaware of Sabine’s presence, the man kneeled down onto the packed snow and came on all fours, then—to Sabine’s profound surprise—began to crawl slowly onto the frozen river. Source: Internet
He drops to all fours and does damage in an area of effect after blinking to a location. Source: Internet
DK Adult (2005), ISBN 0789477645 Head-body length (from the nose to the rump while on all fours) ranges from convert. Source: Internet
It involves waving both hands & legs randomly while "on all fours". Source: Internet
Otariids and walruses are capable of turning their hind-flippers forward and under the body so they can "walk" on all fours. Source: Internet