someone exhibiting questionable mental ability. displaying evidence of little thought or research in ones' thoughts or actions. operating more by 'feel' as opposed to carefully planned and/or 'thought out' actions.
behavior in 'society' triggering doubt re: the normal formation and/or usage of ones' brain. -exposition of evidence of probable mental deficiency
michael foolsley had shown cretinesque tendencies when he started the food fight at lord and lady fauntleroy's dinner party!!
doug vomited all over james suede jacket, exhibiting supreme cretinesque tendancies!!
alcohol 'greased the skids' for bubba's cretinesque behavior!!