Mock; to mock; the act of mocking; not merely as imitation...just mockery. Mimic means mock. If anyone tries to tell you otherwise and then looks up mimic in the dictionary and finds that the word "mock" is in the second definition of the word, then they have a bad dictionary. The one and only definition of mimic is "to mock" so sayeth the urban dictionary.
To mimic someone is the same thing as mocking them.