Even uniquity can come in degrees. If something differs from everything else in one aspect it is unique. Something that differs from everything else in two aspects is more unique and if you have three unique things and the third differs from everything else in three or more aspects it is the most unique.

As olly says, exaggeration can come in degrees and there may be a level that is acceptable. If I've told you this once I've told you a thousand times. But If I said that I've told you this a googol times, that would be over exaggeration.