Dope-head: a person who takes dope, elicit drugs. More accurately, a person who abuses drugs. Root word, dope, so called because really dopey people take it, also people lacking basic intelligence.
Interesting side note: Hunter Biden is a dope-head. He is also the smartest person Joe Biden knows. I wonder what that says about Obama. (Wonder how long it will take Kamala Harris to ascend to The White House.)