No because an idiom is a phrase that seems to mean one thing, but actually means another. "Copycat" is slang meaning that someone is just copying something that another person said or did.
What do you do after you talk to the copycat...
Copycat
The cast of Copycat - 2011 includes: Kerry Griffin as Copycat
Copycat was released on 10/27/1995.
The Production Budget for Copycat was $20,000,000.
The Copycat is in Saffron City, near the train station.
Copycat grossed $32,051,917 worldwide.
A copycat!
Copycat has an effect that Triggers when it is summoned. Stardust Dragon Assault Mode can chain to this trigger to negate it, and destroy Copycat.
The Copycat is in Saffron City, near the train station.
Emily was a copycat because she copied every movement of Jasmines.
Copycat grossed $32,051,917 in the domestic market.