puffery

n. exaggerated praise, extravagant commendation

Puffery as a legal term refers to promotional statements and claims that express subjective rather than objective views, such that no reasonable person would take literally. Puffery is especially featured in testimonials.For instance, a diner advertisement promoting the “world’s best cup of coffee” would classify as puffery. That claim would be almost impossible to substantiate, and no reasonable consumer would take such exaggeration at face value.Puffery often uses the superlative form of a word, like “best” or “greatest”. However, a company making a superlative claim such as “cheapest” or “safest” usually has to substantiate such competitive claims. Merchants must exercise extreme caution when making statements about the quality, condition, or facts about their products or services. A slight variation in wording may result in an express warranty.
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(n.)
The act of puffing; bestowment of extravagant commendation.
  

bias exaggerated opinion in an advertisment disguised as objective, honest praise; a perjorative term for advertising.

puffery /'pʌfəri/
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