"Tjenner" is a Norwegian word, and it means "coworker" or "colleague" in English. In the context of porn video tags, this term might be used to describe a scene where two coworkers engage in sexual activities with each other. These scenes often involve individuals who are dressed professionally or in office attire, and the setting may resemble a workplace environment. The fantasy element here is the taboo nature of having intimate relations with a colleague within a professional context.