Australian slang (noun), used to describe a person who is acting funny or like an idiot, is rude and inconsiderate, sometimes unknowingly.
It can also be used as a joke between friends, for example, creating a leaderboard with rankings of who the biggest sniff of the week is out of your group (and another ranking with potential sniffs) depending on the severity of sniff things they did.
When you walk into a room and one person doesnât say hello to you, theyâre a sniff
âAs if youâre not answering your phone, youâre a sniff!â
âYou havenât visited our mate in hospital yet, what a sniffâ
âHe finished all the alcohol, what a sniffâ
âYouâre a sniff for taking so long to get hereâ
âHe cheaped out on his round on drinks, what a sniffâ