An inability to think clearly and rationally.

The Procavia capensis (“P. capensis”). A mammal with a rodent-like appearance, but not closely related, related instead to the elephant, found in Africa and the Middle East.

Synonym of sleep like a log

(informal psychology) The practice of deliberately making oneself uninteresting and unresponsive so as to defend oneself against a narcissist who wishes to elicit certain responses.

(simile) Utterly solid, firm, or reliable.

Alternative form of gray rock method

Alternative form of leave no stone unturned

plural of Guianan cock-of-the-rock

A small variety of rock cress, Arabis petraea, growing in central and northern Europe.

(simile) Extremely nervous.