Turritella capensis, a species of South African sea snail.

simple past tense and past participle of have a screw loose

present participle of have a screw loose

Tortula muralis, a moss in the family Pottiaceae.

(colloquial) To be a sensible thinker capable of making sound decisions.

Synonym of pluck up one's courage

Alternative form of have one's head screwed on

Alternative form of have one's head screwed on

Alternative form of have one's head screwed on