Определение gym bunny в Английский Язык Английский Язык словарь
A person who spends a large amount of time working out at a gym and who may be obsessed with improving his or her physique. Often said of a gay man, but also said of women and heterosexual men
Thus the lithe and slightly feminised John Travolta of Saturday Night Fever is transformed into the pumping, grinding-body-obsessed gym bunny of Staying Alive.