what is sniff

Sniff is a verb that means to inhale through the nose, usually in short, rapid, audible inspirations, as for the purpose of identifying a scent, for clearing a congested nasal passage, or for expressing disdain or scorn. It can also mean to smell something by taking air in through your nose. Sniff can be used as a noun to refer to an act of sniffing, a single, short, audible inhalation, or a sign of disapproval or contempt. In modern text messaging, sniff is used to signify a melodramatic sad feeling as succinctly as possible.