Sardonic describes a kind of humor that's mocking, bitter, or scornful, often delivered with a straight face or deadpan expression. When someone makes a sardonic comment, they're being funny in a dark, cutting way that shows they don't think much of whatever they're talking about.

Imagine a student who's been assigned a ten-page report over spring break making a sardonic remark: “Oh great, exactly what I wanted for vacation.” The words sound like gratitude, but the tone makes it clear they mean the opposite. Or picture a character in a movie who, after everything goes wrong, says with a slight smirk, “Well, that went perfectly.” That's sardonic humor: bitter irony wrapped in a joke.

Sardonic is different from regular sarcasm, which can be playful. Sardonic humor has an edge to it, a darkness or cynicism underneath. It can come from someone who's seen enough disappointment or absurdity that they've developed a sharp, mocking wit about it. A sardonic grin or smile doesn't show happiness. It shows someone finding dark amusement in something that's actually frustrating or ridiculous.