(noun)
an explosive sound made by an animal by or as if by forcefully expelling breath, often made when the animal is frightened or excited;
e.g. The pony gave a nervous snort when approached by a stranger.
(noun)
in informal usage, a quantity of an alcoholic drink, especially straight liquor, taken in a single swallow;
e.g. He took a long snort from the bottle they passed him.
(noun)
some amount of an illegal narcotic drug, especially cocaine, that is inhaled through the nose in powdered form;
e.g. He took a snort of cocaine off the table.
(verb)
to make an explosive noise by forcefully expelling breath through one's nose, often in order to express anger, scorn, disbelief, or surprise;
e.g. He tried not to snort with laughter when they told him the ridiculous story.
(verb)
in informal usage, to inhale some illegal drug, especially cocaine, in powdered form through the nose;
e.g. He watched them snort cocaine off the counter.