A snarky comment is sarcastic and impertinent. It would be snarky to roll your eyes and yawn loudly while your friend is telling you the plot of a movie they really enjoyed.
Snarky originally meant "cranky or bad-tempered." By the end of the 20th century, it took on the additional meaning of "irreverent or contemptuous." When you say something snarky, you're probably trying to be funny, but in a biting or mean way. If you're tempted to leave snarky comments on a website or whisper something snarky to your friend about a classmate, you may want to consider the adage, "If you can't say something nice, don't say anything at all!"
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