an attitude towards differences of opinion, where oppositional stand-off or conflict is preferred over debate and compromise.

plural of trench mentality

(informal) A stupid person.

plural of mental midget

A deviation in mental function.

plural of mental aberration

(psychology, dated) A developmental disability in which the person has a very low intelligence quotient, usually below 70, plus difficulty in multiple areas of daily life. Evidence of this disability must have appeared before the person reached adulthood for diagnosis.

(UK, slang) An insane person; a nutcase.

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.

plural of plantation mentality