She 'played/acted dumb' [=pretended to know or understand less than she really did] so we would assign her the easier tasks.
She thinks television is contributing to the 'dumbing down' of America.
Cutting training programs will 'dumb down' the American workforce.
(..) Come out. Thief! Want more notices? We weren't recognized. How come? They're so dumb. We used our heads. White rice with mayonnaise. A perfect Japanese meal! Want some? No barking, no food. (..)2007 Kantoku · Banzai!