That One Friend represents a relatable meme format built on shared experiences within friend groups. The format typically contrasts four or more images, with one showing a friend doing something distinctive or problematic and the others showing normal behavior. The humor derives from the recognition that nearly every friend group has members who serve specific roles or exhibit particular behaviors. What makes this format powerful is its universality, the specific friend type being referenced varies by group, but every viewer can identify with the concept. The format turned out to be flexible enough to accommodate countless variations and friend archetypes. Unlike many memes based on absurdism or niche humor, That One Friend appeals broadly because it reflects genuine social experience.

The format emerged during a period when Instagram and Twitter culture emphasized relatable, personal content and friend group documentation. Social media algorithms favored content that users would share with friends, making relatable friend-based humor particularly popular. The format benefited from the existing trend of comparing friend group dynamics and archetypes. The 2019 timing coincided with increased emphasis on documenting and sharing aspects of daily social life online.

To use That One Friend, find or create images representing a friend group where one member is distinguished by specific behavior or characteristic. The format typically contrasts the unusual friend with others, using captions to explain the distinctive behavior. The humor comes from how relatable and recognizable the archetype is.