Sarcasm
Etymology
From Greek sarkasmós, from sarkázein, literally "to tear flesh," from sárx ("flesh"). The word for a bitter taunt began as an image of biting or gnashing at meat, then narrowed to a sneering, wounding wit. The violence in the root survives in how the word still feels.
noun · /SAR-kaz-um/
Sharp, mocking remarks that mean the opposite of what they literally say, meant to cut.
What it names
The bite in "oh, great, another meeting" — irony sharpened into a weapon, where tone tells you the words are a jab.
Example
When the printer jammed again, her sarcasm was withering: "Wonderful. Truly cutting-edge technology."
Related idea
Irony is the broad category of saying one thing and meaning another; sarcasm is its aggressive, personal edge, defined by the intent to sting.