Genius
A genius was an unusually intelligent person. The term could also be used sarcastically to describe a person whose level of intelligence was questionable.

In 2255 of the alternate reality,  described  as "the only genius-level repeat offender in the Midwest." ()

In 2266, James T. Kirk expressed his distaste for "the headquarters genius that assigned me a female yeoman". This was shortly after Janice Rand, the yeoman in question, brought him the dietary salad he had been prescribed by Doctor Leonard McCoy, saying it was past time that he ate something. Kirk felt she was hovering around him. ()

Richard Daystrom was a genius, a fact which was noted on his biographical tape. Kirk believed the word to be an understatement, as he made significant discoveries in the field of duotronics at the relatively young age of 24. ()

In 2268, Kirk lamented Garth of Izar's state of madness, as the man had been a genius. ()

Doctor Noonian Soong was considered a genius by Human standards. ()

In 2369, Julian Bashir expressed an interest in meeting the person who created the aphasia virus, as he believed them to be a genius. ()

See also 
 Expert
 Maestro
 Prodigy
 Virtuoso

External link 
 
Psychology
Insults