sphexish /ˈsfɛksɪʃ/ adjective1 •Of animal behaviour: deterministic, preprogrammed.Is this the top of the pinnacle then? Or is it just the top of our pinnacle, the point at which we reveal our sphexish streak and flounder about foolishly in the face of higher thought? — 1984 formsmore sphexish · most sphexish