—v.t. 1. to do to excess; overindulge in: to overdo dieting. 2. to carry to excess or beyond the proper limit: He puts on so much charm that he overdoes it. 3. to overact (a part); exaggerate.
4. to overtax the strength of; fatigue; exhaust.
5. to cook too much or too long; overcook: Don't overdo the hamburgers.
—v.i. to do too much; go to an extreme: Exercise is good but you mustn't overdo.