| all fours | |
| —n | |
| 1. | both the arms and legs of a person or all the legs of a quadruped (esp in the phrase on all fours) |
| 2. | another name for seven-up |
| the offspring of a zebra and a donkey. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
on all fours
On one's hands and knees, as in Seven of us were on all fours, looking for the lost earring in the sand. In this idiom fours refers to the four limbs. [1300s]