'copycat' definitions:

Definition of 'copycat'

From: WordNet
noun
Someone who copies the words or behavior of another [syn: copycat, imitator, emulator, ape, aper]

Definition of 'copycat'

From: GCIDE
  • copycat \cop"y*cat`\, copy cat \cop"y cat`\n. someone who copies the words or behavior of another.
  • Syn: imitator, ape, aper. [WordNet 1.5]