emp·ty–head·ed 
/ˌɛmptiˈhɛdəd/ adjective
/ˌɛmptiˈhɛdəd/ adjective [more empty–headed; most empty–headed] : not intelligent : stupid
▪ He thinks all athletes are just empty-headed jocks.
▪ He thinks all athletes are just empty-headed jocks.
— emp·ty–head·ed·ness /ˌɛmptiˈhɛdədnəs/ noun [noncount]
