the.com/mental
Either it concerns the mind, or someone just lost theirs — context decides.
means Relating to the mind; informally, behavior so wild it suggests the mind has briefly left the building.
from From Latin mentalis, born of mens (mind) — the same root behind mention, mental, and dementia, all circling the act of thinking.
British slangmeans crazy, chaotic, or thrillingly out of control
Word familyshares mens with mention and demented
Mental agea 1900s metric that quietly fueled IQ testing