The word "eff" plays a multifaceted role in literature, appearing both as an ordinary name and as a symbolic or abbreviated term. In certain passages it serves as a personal name—a character called Eff is portrayed as a playful child [1] or as a singer with a distinctive presence [2, 3]—while in others it functions as a shorthand for “effect” or is embedded in technical and classical expressions, drawing on Latin roots to denote causality or specific functions [4, 5, 6]. Moreover, "EFF" emerges as an acronym representing modern institutions like the Electronic Frontier Foundation, thereby linking the term to contemporary themes of technology, advocacy, and digital rights [7, 8, 9, 10, 11]. This range of uses underscores the term’s versatility and enriches its literary and cultural significance.