Not in the same vein as an over "exaggeration" or an "under exaggeration."
In the act has a similar result to regular exaggeration, but when stated causes the "Oh yeah, I guess I can see that... " response in those who hear it.
Synonyms for appropriate exaggeration
On this page, you will find 30 slang terms related to appropriate exaggeration. Some of the top words include: Pafuckinlease, Poonta, unfact, whatever, when pigs fly..., and 25 more.