The term 'LACKING MANNERS' can be described by the crossword solutions of COARSE (6 letters), UNCOUTH (7 letters), RUDE (4 letters), and RAISEDINABARN (13 letters). COARSE means rough or harsh in texture, while UNCOUTH means lacking refinement or civility. RUDE is defined as impolite or disrespectful, and raisedinabarn is an idiom meaning someone who is unsophisticated or has not been exposed to proper etiquette. All of these terms describe someone who is lacking manners.