A man or women who acts like a looney jackass and/or sheer moron. A silly word to get someones attention to there act of looney stupidiy with out getting a quick asskicking.
"Jane is such a twattwaffle for cutting that man off and cursing him like he did it","look here twattwaffle! you short changed me a dollar just beacuse I did not like you service"
by Angel Faced Killer May 13, 2006