The phrase signifies a specific non-canonical pairing of characters from the Dragon Ball franchise. It denotes a relationship, often romantic or suggestive, between Krillin, a human martial artist, and Android 17, a powerful cyborg. The pairing exists primarily within fan-created content such as fan fiction, fan art, and other forms of transformative works. As an example, a search for the phrase will yield numerous images and stories depicting the two characters interacting in various scenarios not present in the original series.
The appeal of such pairings lies in the creative freedom afforded to fans. Exploring unconventional relationships between characters allows for the examination of different dynamics and narratives beyond the established canon. Furthermore, these pairings can provide a platform for exploring themes not explicitly addressed in the source material, such as shifting allegiances, unexpected bonds, and character reinterpretations. The origin of the popularity for this specific pairing is difficult to pinpoint, but it likely stems from perceived character traits and interactions, combined with an active and imaginative fanbase.