the.com/impressionist

means An artist (or performer) who captures the fleeting impression a subject makes on the senses rather than its precise outline — or, more broadly, someone skilled at mimicking the style and mannerisms of others.

from From 'impression,' via Latin imprimere, 'to press into.' The painting sense was coined almost as an insult: critics mocking Claude Monet's 1872 canvas 'Impression, Sunrise' at an 1874 Paris show that the group embraced the jab and called themselves Impressionists. The 'does impressions of celebrities' sense followed later, built on the same idea — capturing the fleeting impression someone leaves rather than reproducing them exactly.