Step 1: Develop an air of nonchalance, as if discussing the weather.
Step 2: Lean in, eyes locked on your target, and whisper: "You're a terrible person."
Step 3: Maintain a poker face, as if discussing a pleasant topic.
Optional Step 4: Follow up with a series of pointed, yet passive-aggressive, questions.
Example:
"Are you still eating that awful lunch every Thursday?
"Don't you ever tire of the same old routine?"
Hyperlinks:
Learn about Method 4: 'The Art of Subtle yet Crushing Self-Esteem.'
Discover more about Method 2: 'The Art of Strategic Ignoring.'
Read the basics of Method 1: 'The Art of Inconspicuous Presence.'