#FrankyVenegas, known to many as one of the viral #IslandBoys twins, has been arrested ... after his girlfriend told cops he slapped her and pushed her in the pool. According to legal docs, obtained by #TMZ Venegas' girlfriend told police they got into an argument Saturday at the pool area of their Airbnb in Pompano Beach -- after she threatened to break up with him due to his "physical abusive behavior." Via tmz_tv • Riemoh