The material out of which something is made or formed; substance. The essential substance or elements; essence: "We are such stuff/As dreams are made on\u201d ( Shakespeare). Informal Unspecified material: Put that stuff over there. Informal Household or personal articles considered as a group. Informal Worthless objects. Slang Specific talk or actions: Don't give me that stuff about being tired. Sports The control a player has over a ball, especially to give it spin, english, curve, or speed. Sports The spin, english, curve, or speed imparted to a ball: "where we could watch the stuff, mainly curves, that the pitchers were putting on the ball\u201d ( James Henry Gray). Basketball A dunk shot. Special capability: The team really showed its stuff and won the championship. Chiefly British Woven material, especially woolens. Slang Money; cash. Slang A drug, especially one that is illegal or habit-forming. To pack (a container) tightly; cram: stuff a Christmas stocking. To block (a passage); plug: stuff a crack with caulking. Basketball To block (a shot or an opponent who is shooting), especially before the ball leaves the shooter's hands. To place forcefully into a container or space; thrust: stuffed laundry into the bag. Sports To shoot (a ball or puck) forcefully into the goal from close range. Basketball To dunk (the ball). To fill with an appropriate stuffing: stuff a pillow. To fill (an animal skin) to restore its natural form for mounting or display. To cram with food. To fill (the mind): His head is stuffed with silly notions. To put fraudulent votes into (a ballot box). To apply a preservative and softening agent to (leather).