from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Slang Rudely sarcastic or disrespectful; snide.
- adj. Slang Irritable or short-tempered; irascible.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Snide and sarcastic; usually out of irritation, often humorously.
From dialectal snark, to nag, from snark, snork, to snore, snort, from Dutch and Low German snorken, of imitative origin.(American Heritage® Dictionary of the English Language, Fourth Edition)
snark + -y; 1906, as “irritable”, from 1866 snark ("to snort"), by (onomatopoeia). Compare Low German snarken, North Frisian snarke, Swedish snarka. (Wiktionary)