Mimic dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.

Interpretation 1 — Stearn Robinson - Tom Corbett

If you dreamed of mimicking someone, the dream is warning you against that person, and if you couldn’t identify the one you mimicked, you are being cautioned to beware of deceit in an important matter.

If your dream concerned watching a mimic, you are likely to encounter opposition from an unknown source.

Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett

Interpretation 2 — Margaret Hamilton

See “imitation”
Source: Dream Dictionary Unlimited Author: Margaret Hamilton