hard–core 
/ˈhɑɚdˈkoɚ/ adjective
/ˈhɑɚdˈkoɚ/ adjective [more hard–core; most hard–core] 1 : very active and enthusiastic
▪ He knows that he can count on his hard-core supporters. ▪ hard-core fans 2 : showing or describing sex acts very openly
▪ hard-core pornography — compare soft-core
▪ He knows that he can count on his hard-core supporters. ▪ hard-core fans
▪ hard-core pornography — compare soft-core
