(dated) mental hospital

plural of mental disorder

(psychiatry) A behavioral or mental pattern that may cause suffering or a poor ability to function in life.

plural of mental gymnast

Someone who excels at mental gymnastics; a person who thinks creatively and effortlessly. / (derogatory) One who uses complex arguments to justify what is otherwise unjustifiable.

plural of mental midget

(informal) A stupid person.

plural of mental aberration

A deviation in mental function.

The act of holding back some word or clause which is necessary to convey fully the meaning really intended by the speaker, distinct from equivocation.