overact

verb

1. (intransitive)To act in an exaggerated manner.

   “He overacted his part.”

   “If governments overact and become oppressive, the terrorists will have won, for their theory is that repression will eventually lead to revolution.”

   “The scenework proves unsuccessful when Carmichael recalls not the source of her misandry but another episode of overacting, that of castratively biting off the moustache of an amorous man.”

2. (obsolete, transitive)To act upon, or influence, unduly.

   “The hope of inheritance overacts them.”

   “The χαμολνία, Humicubation, lying upon ground, &c. which things have been overacted, and still are in the Greek and Roman Churches.”