a grotesque or absurd chief character in a puppet show of Italian origin: the prototype of Punch.
2.
any similarly grotesque or absurd person or thing.
Origin: 1660–70; < It (Naples dial.) polecenella character in the puppet show, dim. of polecana turkey-cock chick < LL pullicēnus, deriv. of L pulluspullet
Pun·chi·nel·lo (pŭn'chə-něl'ō) n.
pl.Pun·chi·nel·los or Pun·chi·nel·loes
The short fat buffoon or clown in an Italian puppet show.
One who resembles a short fat clown.
[Variant of Polichinello, from Italian dialectal Pollecinella, diminutive of pollecena, turkey pullet (from the resemblance between its beak and Punchinello's nose), ultimately from Latin pullus, young chicken; see pullet.]