(idiomatic, Philippines) A way of thinking best described by the phrase "if I can't have it, neither can you." The metaphor refers to a pot of crabs in which one tries to escape over the side, but is relentlessly pulled down by the others in the pot.

A mentality according to which an organization or society is divided into a ruling elite and a class of workers treated as inferior, especially along racial lines.

The tendency for groups of individuals to act together without planned direction.

(uncountable, psychiatry) The property of being mentally ill; mental disorders taken as a whole. / (countable, psychiatry) A mental disorder.

plural of mental illness

plural of mental age

Having a psychological disorder.

(psychology) Repression of painful thoughts. / (psychology) Inability to continue a train of thought.

How old one appears to be based solely on mental ability and function.

plural of mental institution