Question: where does what you talkin bout willis come from

title: Diff'rent Strokes
text: There were three maids during the sitcom 's run : Edna Garrett ( Charlotte Rae ) , Adelaide Brubaker ( Nedra Volz ) , and Pearl Gallagher ( Mary Jo Catlett ) . They lived in the Penthouse Suite at 697 Park Avenue in New York City . As Arnold , Coleman popularized the catchphrase `` What'chu talkin ' ' bout , Willis ? '' The ending often varied , depending on whom he was addressing . Early episodes addressed typical issues in a family . Later episodes at times though focused on drug abuse , alcoholism , hitchhiking , and crime , among other issues . 

Answer: answer: During the sitcom 's run, as Arnold , Coleman popularized the catchphrase `` What'chu talkin ' ' bout , Willis ? ''