The term 'SHORT BUT NOT SWEET' can be summarized by two crossword solutions: CURT (4 letters) and BRUSQUE (7 letters). Both words describe a type of behavior that is abrupt, unfriendly, and lacking in politeness. CURT is an adjective meaning 'abruptly brief or rude, ' while BRUSQUE is an adjective meaning 'bluntly abrupt or rude.' Both words imply a lack of courtesy or politeness, but CURT is more concise and to the point.