A crutch-like mobility assist device includes a vertical support assembly, a footer assembly attached to a lower connection member of the vertical support assembly, and a tiltable underarm support mechanism connected to an upper connection member of the vertical support assembly, the tiltable underarm support mechanism including a base plate which is rotatable relative to the vertical support assembly, a saddle, and two damper devices between the base plate and the saddle which enable the saddle to tilt forwardly and rearwardly, as well as laterally relative to the vertical support assembly. The tiltable underarm support mechanism is itself usable on crutches of conventional construction.