When to Use
- When you and your friend are silently laughing at a third person's mistake.
- To represent a situation where you feel superior or 'in on the joke'.
- When planning a mischievous prank or scheme with a partner.

Source: Gatchaman
Two animated men with smug, exaggerated smiles stand behind another person, with one man placing his hand on the person's shoulder in a conspiratorial, knowing manner.
This meme is used to convey a sense of scheming, being in on a secret, or acting with a smug, condescending air toward someone.