"Extreme exaggeration" means describing or portraying something in a way that greatly magnifies or amplifies its characteristics or qualities. It goes beyond the reality or truth to emphasize a particular aspect dramatically. Full definition
Or, «Is it too extreme an exaggeration to suggest that high - stakes testing may be lobotomizing an entire generation of young people?» (educationnext.org)
Lomborg also covered all these scares and found extreme exaggeration about many of these so called problems and a blatant disregard for the truth. (jennifermarohasy.com)
It's an extreme exaggeration, and doesn't even work as hyperbole any more. (religion.blogs.cnn.com)