mousey adj 1: infested with mice [syn: {mousy}, {mousey}] 2: of something having a drab pale brown color resembling a mouse; "a mousy brownish-grey color"; "mousy hair"; "mouse- colored hair" [syn: {mousy}, {mousey}, {mouse-colored}, {mouselike}] 3: quiet and timid and ineffectual [syn: {mousy}, {mousey}]