An acronym for "Falling On Outstretched Hands." It is most commonly used in the parkour community as well as the medical field due to FOOSHing causing such a large number of wrist sprains, and bone breaks in the arms.
I sprained my wrist last week while training. I was doing a "Kong Vault," but my hands slipped, I fell forward and FOOSHed.
Initialism for "Fall-On-Outstretched-Hand." Used in medical groups to describe people falling face forward, and attempting to catch themselves with their hands, often resulting in injuries.