A girl using a pair of underarm / axillary<unk> es A man using forearm<unk> es A<unk>  is a mobility aid that transfers weight from the legs to the upper body. It is often used by people who cannot use their legs to support their weight, for reasons ranging from short-term injuries to lifelong disabilities.
Crutch
Pedestrian
Squawk 
Splinter
Hoople 
Hairball
Cowlick
Charley horse