bennied-up adjective1 •Intoxicated by benzedrine or other amphetamines.The next time you sit down at your table with meat, fruit and vegetables, give thanks for it — and for that so-called (by you) bennied-up killer of the highway, the "gypsy," for bringing it to you. — 1971 formsmore bennied up · more bennied-up · most bennied up · most bennied-up