From Longman Dictionary of Contemporary Englishsniff at something phrasal verb1 something is not to be sniffed at spoken used to say that something is good enough to be accepted or considered seriously An 8% salary increase is not to be sniffed at.2 to refuse something in a proud way, or behave as if something is not good enough for you He sniffed at my choice of restaurants and suggested his own favorite. → sniff→ See Verb table
Examples from the Corpus
something is not to be sniffed at• The price, however, is not to be sniffed at: £17.50! 