Plebe
A plebe was a newly entered cadet at Starfleet Academy.

Finnegan tormented James T. Kirk while they were at the Academy together, at which time Kirk was a plebe whereas Finnegan was an upperclassman.

Fifteen years later, in 2267, a robot  on the Shore Leave Planet responded to a question Kirk asked him by commenting, "I never answer questions from plebes, Jimmy boy." Kirk replied that he wasn't a plebe. ()

See also
Freshman
Military ranks
Deleted and unused material in background
Starfleet Academy