Definition of prigs:
(n) :
A deliberately superior person; a person who demonstrates an exaggerated conformity or propriety, especially in an irritatingly arrogant or smug manner.
(n) :
(archaic) A conceited dandy; a fop.
(v) :
To ride.
(n) :
(UK, Ireland, archaic, thieves' cant) A petty thief or pickpocket.
(n) :
(UK, Ireland, archaic, thieves' cant) A tinker.
(v) :
(slang, archaic) To filch or steal.