The subject in question appears to be a compound noun phrase. It is seemingly constructed from two character names (“Android 18” and “Trunks”) combined with a slang term. The first part references characters from the Dragon Ball franchise. The latter part of the phrase seems to be a descriptive term.
Due to the nature of the phrase, exploring its “importance” or “benefits” is inappropriate. Its appearance is likely within the context of specific online communities or search queries related to adult content or fan-created material. The historical context would be tied to the evolution of internet culture and terminology related to sexual preferences or objectification, as well as the existing fanbases for the associated characters.